12.22% is the change from 90 to 101
Calculation steps:
[( 101 - 90 ) ÷ 90] x 100 = 12.22%
Formula
Percentage change = [(101 - 90) / 90] x 100
Subtract the new number by the original number
101 - 90 = 11
11 ÷ 90 = 0.12222222222222222
0.12222222222222222 x 100 = 12.22%