-8.9% is the change from 955 to 870
Calculation steps:
[( 870 - 955 ) ÷ 955] x 100 = -8.9%
Formula
Percentage change = [(870 - 955) / 955] x 100
Subtract the new number by the original number
870 - 955 = -85
-85 ÷ 955 = -0.08900523560209424
-0.08900523560209424 x 100 = -8.9%