-97.72% is the change from 878 to 20
Calculation steps:
[( 20 - 878 ) ÷ 878] x 100 = -97.72%
Formula
Percentage change = [(20 - 878) / 878] x 100
Subtract the new number by the original number
20 - 878 = -858
-858 ÷ 878 = -0.9772209567198178
-0.9772209567198178 x 100 = -97.72%