-95.44% is the change from 878 to 40
Calculation steps:
[( 40 - 878 ) ÷ 878] x 100 = -95.44%
Formula
Percentage change = [(40 - 878) / 878] x 100
Subtract the new number by the original number
40 - 878 = -838
-838 ÷ 878 = -0.9544419134396356
-0.9544419134396356 x 100 = -95.44%