Question

The number of problems that the math team successfully resolved at this year's competition increased from last year by a factor of ten. What is the percent increase?

Answer 1

900%

Explanation:

The number of problems that the math team successfully resolved at this year's competition increased from last year by a factor of ten.

Let number of problems resolved by math team last year be x .

So number of problems resolved by math team this year is 10x.

Percentage increase = ( 10x - x / x) 100

= 900%