Math
posted by Smith .
The sales price of a car is 12,590, which is 20% off the original price. What is the Original price?

Let x equal the original price. Solve for x
0.8x = 12,590
We'll be glad to check your answer. 
.8x/.8 = 12,590/.8
x= 15,737.50
But where did you get 0.8 from? 
Yes. Your answer is correct. The original price of the car was $15,737.50.
I used 0.8 because with a 20% discount, the customer pays 80% (or 0.8) of the original price.