-86.9% is the change from 878 to 115
Calculation steps:
[( 115 - 878 ) ÷ 878] x 100 = -86.9%
Formula
Percentage change = [(115 - 878) / 878] x 100
Subtract the new number by the original number
115 - 878 = -763
-763 ÷ 878 = -0.8690205011389521
-0.8690205011389521 x 100 = -86.9%