-84.28% is the change from 878 to 138
Calculation steps:
[( 138 - 878 ) ÷ 878] x 100 = -84.28%
Formula
Percentage change = [(138 - 878) / 878] x 100
Subtract the new number by the original number
138 - 878 = -740
-740 ÷ 878 = -0.8428246013667426
-0.8428246013667426 x 100 = -84.28%