-97.58% is the change from 827 to 20
Calculation steps:
[( 20 - 827 ) ÷ 827] x 100 = -97.58%
Formula
Percentage change = [(20 - 827) / 827] x 100
Subtract the new number by the original number
20 - 827 = -807
-807 ÷ 827 = -0.9758162031438936
-0.9758162031438936 x 100 = -97.58%