87.5% is the change from 128 to 240
Calculation steps:
[( 240 - 128 ) ÷ 128] x 100 = 87.5%
Formula
Percentage change = [(240 - 128) / 128] x 100
Subtract the new number by the original number
240 - 128 = 112
112 ÷ 128 = 0.875
0.875 x 100 = 87.5%
Example