-73.31% is the change from 959 to 256
Calculation steps:
[( 256 - 959 ) ÷ 959] x 100 = -73.31%
Formula
Percentage change = [(256 - 959) / 959] x 100
Subtract the new number by the original number
256 - 959 = -703
-703 ÷ 959 = -0.7330552659019812
-0.7330552659019812 x 100 = -73.31%