Question

The price of a set of books was originally $70. The set of books is now on sale for 18% off. What is the

sale price of the set of books?
Use y to represent the sale price of the set of books and write an equation to
represent the problem.

Answer 1

Answer: The final sale price is 57.4

y= 70 x .82 or y= (70 x .18) - 70

Explanation:

Alright so- first we would do 18/100 to get our percentage, which is 0.18%.

Then we multiply that by 70, so 70 x 0.18 which gives us 12.6.

We take the 12.6 and subtract that from 70. 70 - 12.6 = 57.4 which is the final sale price

An equation for this is y= 70 x .82.

The reason why its .82 is because I subtracted the 18 from a 100 to get a remained of .82, which just makes the equation a little bit simpler so we get a final answer instead of what I did earlier by doing the subtraction later.