-42.37% is the change from 878 to 506
Calculation steps:
[( 506 - 878 ) ÷ 878] x 100 = -42.37%
Formula
Percentage change = [(506 - 878) / 878] x 100
Subtract the new number by the original number
506 - 878 = -372
-372 ÷ 878 = -0.42369020501138954
-0.42369020501138954 x 100 = -42.37%