-90.01% is the change from 801 to 80
Calculation steps:
[( 80 - 801 ) ÷ 801] x 100 = -90.01%
Formula
Percentage change = [(80 - 801) / 801] x 100
Subtract the new number by the original number
80 - 801 = -721
-721 ÷ 801 = -0.9001248439450686
-0.9001248439450686 x 100 = -90.01%