SOLUTION: Someone asked this question earlier and the answer is given I just want to know how u got .75? A pair of jeans sells for $36 after a 25% discount. What is the original price of

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Someone asked this question earlier and the answer is given I just want to know how u got .75? A pair of jeans sells for $36 after a 25% discount. What is the original price of      Log On


   

Question 31800: Someone asked this question earlier and the answer is given I just want to know how u got .75?
A pair of jeans sells for $36 after a 25% discount. What is the original price of the jeans?
x-0.25x=36
0.75x = 36
x = 36/0.75
x = 48
So, the answer is $48. How dod uget the .75 What do u do to get that? Thank You
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
in words:
let original price be x
So we then reduce the price by 25%.

So what is 25% of x? Well, 25% is 25 percent. PERCENT is Latin: PER CENT....out of 100. So 25 out of 100 is 25/100 --> 0.25.

So 0.25 of x means 0.25x. This is the amount we took off, to reduce the price.

So we had ORIGINAL less REDUCTION = new price
--> x - 0.25x = 36
--> 1x - 0.25x = 36
--> 0.75x = 36
--> x = 36/0.75
--> x = 48

Once you get used to questions like these, you can do the majority in your head:

Eg reduce by 12% is 0.88x, since we have x-0.12x.
Eg reduce by 40% is 0.60x, since we have x-0.40x.

Simialrly, an increase of 15% is 1.15x, since we have x+0.15x. And so on.

Does that help?

jon.