-12.86% is the change from 879 to 766
Calculation steps:
[( 766 - 879 ) ÷ 879] x 100 = -12.86%
Formula
Percentage change = [(766 - 879) / 879] x 100
Subtract the new number by the original number
766 - 879 = -113
-113 ÷ 879 = -0.1285551763367463
-0.1285551763367463 x 100 = -12.86%