-20.7% is the change from 256 to 203
Calculation steps:
[( 203 - 256 ) ÷ 256] x 100 = -20.7%
Formula
Percentage change = [(203 - 256) / 256] x 100
Subtract the new number by the original number
203 - 256 = -53
-53 ÷ 256 = -0.20703125
-0.20703125 x 100 = -20.7%