-50% is the change from 956 to 478
Calculation steps:
[( 478 - 956 ) ÷ 956] x 100 = -50%
Formula
Percentage change = [(478 - 956) / 956] x 100
Subtract the new number by the original number
478 - 956 = -478
-478 ÷ 956 = -0.5
-0.5 x 100 = -50%
Example