-78.7% is the change from 878 to 187
Calculation steps:
[( 187 - 878 ) ÷ 878] x 100 = -78.7%
Formula
Percentage change = [(187 - 878) / 878] x 100
Subtract the new number by the original number
187 - 878 = -691
-691 ÷ 878 = -0.7870159453302962
-0.7870159453302962 x 100 = -78.7%