-90.05% is the change from 804 to 80
Calculation steps:
[( 80 - 804 ) ÷ 804] x 100 = -90.05%
Formula
Percentage change = [(80 - 804) / 804] x 100
Subtract the new number by the original number
80 - 804 = -724
-724 ÷ 804 = -0.900497512437811
-0.900497512437811 x 100 = -90.05%