-70.96% is the change from 878 to 255
Calculation steps:
[( 255 - 878 ) ÷ 878] x 100 = -70.96%
Formula
Percentage change = [(255 - 878) / 878] x 100
Subtract the new number by the original number
255 - 878 = -623
-623 ÷ 878 = -0.7095671981776766
-0.7095671981776766 x 100 = -70.96%