Question

Simon needed 10 gallons of gas last week.This week, Simon ended up needing 10% less. How much gas is that?

Answer 1

9 gallons

Explanation:

Calculate the percentage of gas that Simon did not use this week.

10 × 0.10 = 1

Now, calculate how much he used this week.

10 - 1 = 9

Simon used 9 gallons of gas this week.