-63.9% is the change from 878 to 317
Calculation steps:
[( 317 - 878 ) ÷ 878] x 100 = -63.9%
Formula
Percentage change = [(317 - 878) / 878] x 100
Subtract the new number by the original number
317 - 878 = -561
-561 ÷ 878 = -0.6389521640091116
-0.6389521640091116 x 100 = -63.9%