962.5% is the change from 24 to 255
Calculation steps:
[( 255 - 24 ) ÷ 24] x 100 = 962.5%
Formula
Percentage change = [(255 - 24) / 24] x 100
Subtract the new number by the original number
255 - 24 = 231
231 ÷ 24 = 9.625
9.625 x 100 = 962.5%
Example