-99.5% is the change from 804 to 4
Calculation steps:
[( 4 - 804 ) ÷ 804] x 100 = -99.5%
Formula
Percentage change = [(4 - 804) / 804] x 100
Subtract the new number by the original number
4 - 804 = -800
-800 ÷ 804 = -0.9950248756218906
-0.9950248756218906 x 100 = -99.5%