Questions on Algebra: Percentage and Pie Charts answered by real tutors!

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Algebra: Percentage and Pie Charts

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Question 240756: $8 dollarsis what percent of $20 dollars?
Click here to see answer by solver91311(5072)

Question 240751: How do I determine the answer to this question:
35% of 12,500 equals ___?
Click here to see answer by solver91311(5072)

Question 240552: Briana took a major test on the 5 oceans and 7 continents of the world. She got 16 out of 20 questions correct on the test.
What was her percentage of correct answers?
Click here to see answer by rfer(2683)

Question 240381: 1. how do you convert 3/7 to a percentage? (round to the nearest tenth if needed)?
2. How do you convert 0.89 to a percentage?
3. How do you convert 5% into a fraction and reduced to lowest term?
4) 100 is 85% of ?
Click here to see answer by checkley77(7035)

Question 239972: When 45 people were polled, 32 liked the restaurant and the others did not like it. If this data were put into a pie chart, how many degrees would be in the angle that represents people who liked the restaurant?
Thank you.
Click here to see answer by checkley77(7035)

Question 239728: A school has a current enrollment of 528 students. That is an increase of 10% over last year. What was last year's enrollment?
Click here to see answer by edjones(3291)

Question 239176: I have asked my teacher for help, but she says according to the school rules she cannot help me. She cannot even offer an example problem to give me the concepts needed to figure out this equation.
Selena left an 18% tip for a meal. The total cost of the meal, including the tip, was $40.71. What was the cost of the meal before the tip was added?
I came up with this formula
(x)(18%)=40.71
(x)(18%)/18%=40.71/18%
x=226.17
Which according to division rules, I am to move the decimal over....22.62 (rounding to the nearest tenth)
therefore 22.62 times 18% is 4.071, moving the decimal that would be correct.
Is there a rule for moving the decimal in these algebraic equations?
Thank you very much!
Click here to see answer by checkley77(7035)

Question 239025: I really need help on this question:
A goldsmith has two different alloys of gold. One is 50% and one is 75%. A custom necklace requires 200g of 66% gold. How much of each alloy is needed to make this.
Click here to see answer by scott8148(3382)

Question 239022: I need help with this question please..
A goldsmith has two different alloys of gold. One is 50% and one is 75%. A custom necklace requires 200g of 66% gold. How much of each alloy is needed to make this?
Click here to see answer by scott8148(3382)

Question 238386: what is the percent increase in the population for all six inhabited continents, excluding asia from 1950 to 2000
Click here to see answer by College Student(199)

Question 238861: The sales price of a car is $12,590, which is 20% off the original price. What is the original price?
Click here to see answer by josmiceli(3003)

Question 238735: I'm not sure if this is the right category? But Can you please help me figure this one out? Thank you so much in advance for your time...
The problem states:
Find four large cities around the world and an approximate percentage rate of population growth for the countries in which the cities are located. Estimate the population in each of the four cities in 25 yr.
Say the pop. is 199,999 and the approx. % rate is 7%.Will this formula work:
FV= PV * (1 + r) ^t

Click here to see answer by JimboP1977(75)

Question 238381: Trying to assist son with homework that is due Monday. I never took algebra in high school it was an elective and I should have but never did take it so it is difficult to help him but I guess we are learning together. If you could please explain the answer so I could know how to explain it problem to him that would be great.
1) Find and equation of the line that passes through the given point and has the given slope. Express answer in slope intercept form. (8,0), m= -3. Could you tell me what the formula is for one given point.
2) Find an equation of a line satisfying the given conditions. Express in standard form.
parallel to 3x-y= -5 and passing through (-1,0) Please provide formula
Thanks for any help
Click here to see answer by scott8148(3382)

Question 238280: only 20 percent of the towels were wet. if 520 towels were dry,how many towels were there in all?
Click here to see answer by checkley77(7035)

Question 238220: What is 66 2/3% of 90?
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Question 238093: I have 8 stores who have to share the cost of supplies. Their cost is based on their production. The cost of the supply is $207.00.
Store 1 production is 1,368
Store 2 production is 2,130
Store 3 production is 5897
Store 4 production is 5,400
Store 5 prod is 4,438
Store 6 prod is 5,916
Store 7 prod is 5,880
Store 8 prod is 5,944
How do I figure the percentage that each store should pay of the $207.00 cost of the supply
Click here to see answer by Stitch(43)

Question 237676: a dvd player originally cost $150. It is on sale for $72.50. what is the percent of the discount, rounded to the nearest tenth of the percent?
Click here to see answer by nerdybill(2446)

Question 237550: 135 is what percentage of 1125
Click here to see answer by josmiceli(3003)

Question 237469: If a product normally retails for $40.00 and we give you a $10 discount, what percentage discount do you receive?
Click here to see answer by checkley77(7035)

Question 237357: what is 10% off $7.35.
Click here to see answer by solve it!(2)

Question 237357: what is 10% off $7.35.
Click here to see answer by College Student(199)

Question 236652: what percentage of 300 is 40?

Click here to see answer by stanbon(26252)

Question 236656: what percentage of 300 is 40?

Click here to see answer by srisanj4(2)

Question 236577: Amy paid 77.03 for a pair of shoes. The shoes were 40% off sale. What was the regular price
Click here to see answer by rfer(2683)

Question 236593: percent of change original 25 new 10
Click here to see answer by checkley77(7035)

Question 236470: I am needing to find a formula for finding the percent of increase or decrease of problems such as: What is the % of increase of 45mph to 60mph.
I tried dividing 45/60 and 60/45 and finding the difference between 45 to 60 and multiplying. But nothing is giving me the answer?

Click here to see answer by JimboP1977(75)

Question 236471: If I had an old TV that is 15" by 20" and bought a new TV that measures 18" by 32", how do I make a formula to find out the percent of increase in area of the new TV Screen? I think I can find area of each, but am lost when it comes to finding the percent of increase. Can you help please
Click here to see answer by JimboP1977(75)

Question 236475: Ok this has got me.. If I was selling a leather coat at my store and increased the price by 10% then declared a sale at 10% off wouldn't the price be $99?
I worked this two different ways and one way I get $99 and the other I get $98
What am I doing wrong? Can you show me the correct way to do this one?
Click here to see answer by JimboP1977(75)

Question 235975: from $50 to $67
is it percent of increase or percent of decrease
Click here to see answer by xmoo22xx(3)

Question 235885: Is 33(1/3)% equal to (1/3) of the value?
Click here to see answer by nyc_function(260)

Question 234658: what would you be paid if you sold a used car for $12,050 and your commision was 10 percent?
Click here to see answer by rfer(2683)

Question 234412: In 2006, the # of Americans who were members of a health club was 42.7 million. This was an increase of 106% from th enumber of health club members in 1990. How many Americans were Health club members in 1990? Percentages are lost on me!
Click here to see answer by ankor@dixie-net.com(6691)

Question 234473: An instrument store gives a 10% discount to all students off the original cost of an instrument. During a back to school sale an additional 15% is taken off the discounted price. Julie, a student at the local high school, purchases a flute for $306. How much did it originally cost?
A. $325
B. $375
C. $400
D. $408
E. $425
I was given the correct answer but I dont know how to get it.

Click here to see answer by checkley77(7035)

Question 234471: ONE PIECE OF THE PIE HAS THE SAME SHAPE AS WOULD BE FORMED BY THE HANDS OF A CLOCK WHEN IT IS EXACTLY THREE O'CLOCK.THIS PIECE WOULD REPRESENT _% OF THE WHOLE PIE.
Click here to see answer by solver91311(5072)

Question 234411: The perimeter of a rectangular driveway is 168 feet. The length is 12 feet longer than three times the width. What are the dimensions of the driveway?
I do not even know which formula to use to solve this problem. If someone could tell me how to begin I could probably figure it out.
Click here to see answer by scott8148(3382)

Question 234413: Tori invested $8000 in money market funds. Part was invested at 5% simple interest and the rest at 7% simple interest. At the end of 1 year, Tori had earned $496 in interest. How much did she invest in each fund?
Click here to see answer by stanbon(26252)

Question 234206: One sixth of all sales are for cash. Cash sales for the week were $265, what were the total sales.
Click here to see answer by checkley77(7035)

Question 234018: what are two ways you can find 13 percent of a number
Click here to see answer by Alan3354(6059)

Question 234062: I work with 63 toes. I done 28. what precent of the work have i'done?
Click here to see answer by rfer(2683)

Question 233911: A solar calculator that costs $75 last year is now $83. What percent increase is this? Thanks
Click here to see answer by rfer(2683)

Question 233523: Amy paid 58.47 for a pair of running shoes at 40% off sale.what is the regular price?
Click here to see answer by stanbon(26252)

Question 233523: Amy paid 58.47 for a pair of running shoes at 40% off sale.what is the regular price?
Click here to see answer by checkley77(7035)

Question 233274: a)In a shipment of 1125 parts, 25 were found to be defective. What percentage of the part were faulty?
b)/5/+/-1/ and /5+-1/ Why are the different?
Click here to see answer by edjones(3291)

Question 233232: Keiko bought a suit on sale for $289 . This price was 15% less than the original price.
What was the original price?

Click here to see answer by Alan3354(6059)

Question 233077: what percent of 88.6 is 70?
Click here to see answer by rfer(2683)

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