9.91% is the change from 232 to 255
Calculation steps:
[( 255 - 232 ) ÷ 232] x 100 = 9.91%
Formula
Percentage change = [(255 - 232) / 232] x 100
Subtract the new number by the original number
255 - 232 = 23
23 ÷ 232 = 0.09913793103448276
0.09913793103448276 x 100 = 9.91%