-9.11% is the change from 966 to 878
Calculation steps:
[( 878 - 966 ) ÷ 966] x 100 = -9.11%
Formula
Percentage change = [(878 - 966) / 966] x 100
Subtract the new number by the original number
878 - 966 = -88
-88 ÷ 966 = -0.09109730848861283
-0.09109730848861283 x 100 = -9.11%