-36.56% is the change from 878 to 557
Calculation steps:
[( 557 - 878 ) ÷ 878] x 100 = -36.56%
Formula
Percentage change = [(557 - 878) / 878] x 100
Subtract the new number by the original number
557 - 878 = -321
-321 ÷ 878 = -0.36560364464692485
-0.36560364464692485 x 100 = -36.56%