-42.6% is the change from 878 to 504
Calculation steps:
[( 504 - 878 ) ÷ 878] x 100 = -42.6%
Formula
Percentage change = [(504 - 878) / 878] x 100
Subtract the new number by the original number
504 - 878 = -374
-374 ÷ 878 = -0.42596810933940776
-0.42596810933940776 x 100 = -42.6%