-8.64% is the change from 961 to 878
Calculation steps:
[( 878 - 961 ) ÷ 961] x 100 = -8.64%
Formula
Percentage change = [(878 - 961) / 961] x 100
Subtract the new number by the original number
878 - 961 = -83
-83 ÷ 961 = -0.08636836628511967
-0.08636836628511967 x 100 = -8.64%