-72.65% is the change from 936 to 256
Calculation steps:
[( 256 - 936 ) ÷ 936] x 100 = -72.65%
Formula
Percentage change = [(256 - 936) / 936] x 100
Subtract the new number by the original number
256 - 936 = -680
-680 ÷ 936 = -0.7264957264957265
-0.7264957264957265 x 100 = -72.65%