-70.79% is the change from 873 to 255
Calculation steps:
[( 255 - 873 ) ÷ 873] x 100 = -70.79%
Formula
Percentage change = [(255 - 873) / 873] x 100
Subtract the new number by the original number
255 - 873 = -618
-618 ÷ 873 = -0.7079037800687286
-0.7079037800687286 x 100 = -70.79%