-12.19% is the change from 878 to 771
Calculation steps:
[( 771 - 878 ) ÷ 878] x 100 = -12.19%
Formula
Percentage change = [(771 - 878) / 878] x 100
Subtract the new number by the original number
771 - 878 = -107
-107 ÷ 878 = -0.12186788154897495
-0.12186788154897495 x 100 = -12.19%