-72.91% is the change from 945 to 256
Calculation steps:
[( 256 - 945 ) ÷ 945] x 100 = -72.91%
Formula
Percentage change = [(256 - 945) / 945] x 100
Subtract the new number by the original number
256 - 945 = -689
-689 ÷ 945 = -0.7291005291005291
-0.7291005291005291 x 100 = -72.91%