110.74% is the change from 121 to 255
Calculation steps:
[( 255 - 121 ) ÷ 121] x 100 = 110.74%
Formula
Percentage change = [(255 - 121) / 121] x 100
Subtract the new number by the original number
255 - 121 = 134
134 ÷ 121 = 1.1074380165289257
1.1074380165289257 x 100 = 110.74%