90.91% is the change from 121 to 231
Calculation steps:
[( 231 - 121 ) ÷ 121] x 100 = 90.91%
Formula
Percentage change = [(231 - 121) / 121] x 100
Subtract the new number by the original number
231 - 121 = 110
110 ÷ 121 = 0.9090909090909091
0.9090909090909091 x 100 = 90.91%