-26.54% is the change from 878 to 645
Calculation steps:
[( 645 - 878 ) ÷ 878] x 100 = -26.54%
Formula
Percentage change = [(645 - 878) / 878] x 100
Subtract the new number by the original number
645 - 878 = -233
-233 ÷ 878 = -0.265375854214123
-0.265375854214123 x 100 = -26.54%