SOLUTION: I really forgot how do do this type of problem $15 is what percent of $75? 4% of what number is 21? What number is 12.5% of 56? Could you please help me? Thank you -Rozz

Question 29775: I really forgot how do do this type of problem
$15 is what percent of $75?
4% of what number is 21?
What number is 12.5% of 56?
Could you please help me? Thank you -Rozz
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
Percentages can be done many ways. First you need to know some vocabulary.
"of" means multiply
"%" means part of 100
"is" means equals
"what number" is usually represented by x or n
There is a siple formula that will work for all three types of problems you have stated here.

$15 is what % of $75

cross multiply

divide both sides by 75

now just multiply the numerator out and divide by the denomonator.
or reduce the fraction first, and then multiply and divide. as I did here.

and you are done.

RELATED QUESTIONS
i need help. i forgot how to do this problem. 1 is what percent of 400? (answered by Mathtut)

how do I figure out this type of problem 4 is what percent of... (answered by Dannylion84)

If you could help me with this it will be greatfully appreciated and i will donate to... (answered by checkley75)

Haveing trouble with this what is 35% of a number if 12 is 15 % of a number How do... (answered by )

43,000 is 80% of what number? How do you figure this problem type? (answered by whenindoubt,ichudov,amalm06,ikleyn)

How do I solve this type of problem? If A:B=3:5 What is B if A is 12?... (answered by jorel1380)

I forgot how to work this type of problem and don't know what to do. 2 3/4 + 1 1/8 (answered by jim_thompson5910,Edwin McCravy)

54 is 15 percent of what... (answered by jorel1380)

Can someone please help me with this problem 36 is .75% of what number? I don't... (answered by tommyt3rd)