87.5% is the change from 256 to 480
Calculation steps:
[( 480 - 256 ) ÷ 256] x 100 = 87.5%
Formula
Percentage change = [(480 - 256) / 256] x 100
Subtract the new number by the original number
480 - 256 = 224
224 ÷ 256 = 0.875
0.875 x 100 = 87.5%
Example