-68.28% is the change from 804 to 255
Calculation steps:
[( 255 - 804 ) ÷ 804] x 100 = -68.28%
Formula
Percentage change = [(255 - 804) / 804] x 100
Subtract the new number by the original number
255 - 804 = -549
-549 ÷ 804 = -0.6828358208955224
-0.6828358208955224 x 100 = -68.28%