-9.01% is the change from 966 to 879
Calculation steps:
[( 879 - 966 ) ÷ 966] x 100 = -9.01%
Formula
Percentage change = [(879 - 966) / 966] x 100
Subtract the new number by the original number
879 - 966 = -87
-87 ÷ 966 = -0.09006211180124224
-0.09006211180124224 x 100 = -9.01%