-80.47% is the change from 809 to 158
Calculation steps:
[( 158 - 809 ) ÷ 809] x 100 = -80.47%
Formula
Percentage change = [(158 - 809) / 809] x 100
Subtract the new number by the original number
158 - 809 = -651
-651 ÷ 809 = -0.8046971569839307
-0.8046971569839307 x 100 = -80.47%