-39.86% is the change from 878 to 528
Calculation steps:
[( 528 - 878 ) ÷ 878] x 100 = -39.86%
Formula
Percentage change = [(528 - 878) / 878] x 100
Subtract the new number by the original number
528 - 878 = -350
-350 ÷ 878 = -0.39863325740318906
-0.39863325740318906 x 100 = -39.86%