1180% is the change from 20 to 256
Calculation steps:
[( 256 - 20 ) ÷ 20] x 100 = 1180%
Formula
Percentage change = [(256 - 20) / 20] x 100
Subtract the new number by the original number
256 - 20 = 236
236 ÷ 20 = 11.8
11.8 x 100 = 1180%
Example