-9% is the change from 956 to 870
Calculation steps:
[( 870 - 956 ) ÷ 956] x 100 = -9%
Formula
Percentage change = [(870 - 956) / 956] x 100
Subtract the new number by the original number
870 - 956 = -86
-86 ÷ 956 = -0.0899581589958159
-0.0899581589958159 x 100 = -9%