-90.98% is the change from 809 to 73
Calculation steps:
[( 73 - 809 ) ÷ 809] x 100 = -90.98%
Formula
Percentage change = [(73 - 809) / 809] x 100
Subtract the new number by the original number
73 - 809 = -736
-736 ÷ 809 = -0.9097651421508035
-0.9097651421508035 x 100 = -90.98%