What is the original price of a book you paid $7.50 while using a 10% discount coupon?

Question

What is the original price of a book you paid $7.50 while using a 10% discount coupon?

Answer 1

If you took 10% off the original price, that means what you ended up paying was 90% of the original price. What you paid was $7.50. Therefore $7.50 is 90% of the original price.

 

x- .10x = 7.50

 

.9x = 7.5

 

x = 7.5/.9

 

x = 8.3333

 

Rounded down, x= $8.33