-54.44% is the change from 878 to 400
Calculation steps:
[( 400 - 878 ) ÷ 878] x 100 = -54.44%
Formula
Percentage change = [(400 - 878) / 878] x 100
Subtract the new number by the original number
400 - 878 = -478
-478 ÷ 878 = -0.5444191343963554
-0.5444191343963554 x 100 = -54.44%