-54.3% is the change from 256 to 117
Calculation steps:
[( 117 - 256 ) ÷ 256] x 100 = -54.3%
Formula
Percentage change = [(117 - 256) / 256] x 100
Subtract the new number by the original number
117 - 256 = -139
-139 ÷ 256 = -0.54296875
-0.54296875 x 100 = -54.3%