-90.14% is the change from 811 to 80
Calculation steps:
[( 80 - 811 ) ÷ 811] x 100 = -90.14%
Formula
Percentage change = [(80 - 811) / 811] x 100
Subtract the new number by the original number
80 - 811 = -731
-731 ÷ 811 = -0.9013563501849569
-0.9013563501849569 x 100 = -90.14%