-78.73% is the change from 804 to 171
Calculation steps:
[( 171 - 804 ) ÷ 804] x 100 = -78.73%
Formula
Percentage change = [(171 - 804) / 804] x 100
Subtract the new number by the original number
171 - 804 = -633
-633 ÷ 804 = -0.7873134328358209
-0.7873134328358209 x 100 = -78.73%