-90.27% is the change from 822 to 80
Calculation steps:
[( 80 - 822 ) ÷ 822] x 100 = -90.27%
Formula
Percentage change = [(80 - 822) / 822] x 100
Subtract the new number by the original number
80 - 822 = -742
-742 ÷ 822 = -0.902676399026764
-0.902676399026764 x 100 = -90.27%