33.33% is the change from 90 to 120
Calculation steps:
[( 120 - 90 ) ÷ 90] x 100 = 33.33%
Formula
Percentage change = [(120 - 90) / 90] x 100
Subtract the new number by the original number
120 - 90 = 30
30 ÷ 90 = 0.3333333333333333
0.3333333333333333 x 100 = 33.33%