1114.29% is the change from 21 to 255
Calculation steps:
[( 255 - 21 ) ÷ 21] x 100 = 1114.29%
Formula
Percentage change = [(255 - 21) / 21] x 100
Subtract the new number by the original number
255 - 21 = 234
234 ÷ 21 = 11.142857142857142
11.142857142857142 x 100 = 1114.29%