-73.33% is the change from 960 to 256
Calculation steps:
[( 256 - 960 ) ÷ 960] x 100 = -73.33%
Formula
Percentage change = [(256 - 960) / 960] x 100
Subtract the new number by the original number
256 - 960 = -704
-704 ÷ 960 = -0.7333333333333333
-0.7333333333333333 x 100 = -73.33%