-90.83% is the change from 218 to 20
Calculation steps:
[( 20 - 218 ) ÷ 218] x 100 = -90.83%
Formula
Percentage change = [(20 - 218) / 218] x 100
Subtract the new number by the original number
20 - 218 = -198
-198 ÷ 218 = -0.908256880733945
-0.908256880733945 x 100 = -90.83%