A company's sales decreased by 8% this year, to $9015. What were their sales last year? (Round your answer to the nearest penny.)

My answer was 9,736.2, but the correct answer was 9798.91. Could someone explain how did they get to 9798.91?

There are two unknow values, your 8% which is the decrease and the main value which is "the sales last year".

It is correct, the number you gave as an answer $9798,91. Let's get the explanation by a rule of three.

Step-by-step explanation:

The 100 % was "the sales last year", the 8% are what the sales decreased but you don't have that number, you have the result in the substraction, $9015. So this are the step by step, hope you understand!