-8.35% is the change from 958 to 878
Calculation steps:
[( 878 - 958 ) ÷ 958] x 100 = -8.35%
Formula
Percentage change = [(878 - 958) / 958] x 100
Subtract the new number by the original number
878 - 958 = -80
-80 ÷ 958 = -0.08350730688935282
-0.08350730688935282 x 100 = -8.35%