Question

There used to be 60 teachers at RWMS, in 2019 there are 72 teachers. What is the percent increase of teachers this year?

Answer 1

Find the difference between the starting and ending values:

72 - 60 = 12

Divide that difference by the starting value:

12 ÷ 60 = 0.2

Convert that to a percent:

0.2 = 20%

The number of teachers increased by 20%.

The key is to divide the difference by the original number, not the ending number.