-90.33% is the change from 827 to 80
Calculation steps:
[( 80 - 827 ) ÷ 827] x 100 = -90.33%
Formula
Percentage change = [(80 - 827) / 827] x 100
Subtract the new number by the original number
80 - 827 = -747
-747 ÷ 827 = -0.9032648125755743
-0.9032648125755743 x 100 = -90.33%