-42.71% is the change from 878 to 503
Calculation steps:
[( 503 - 878 ) ÷ 878] x 100 = -42.71%
Formula
Percentage change = [(503 - 878) / 878] x 100
Subtract the new number by the original number
503 - 878 = -375
-375 ÷ 878 = -0.4271070615034169
-0.4271070615034169 x 100 = -42.71%