3890% is the change from 20 to 798
Calculation steps:
[( 798 - 20 ) ÷ 20] x 100 = 3890%
Formula
Percentage change = [(798 - 20) / 20] x 100
Subtract the new number by the original number
798 - 20 = 778
778 ÷ 20 = 38.9
38.9 x 100 = 3890%
Example