4095% is the change from 20 to 839
Calculation steps:
[( 839 - 20 ) ÷ 20] x 100 = 4095%
Formula
Percentage change = [(839 - 20) / 20] x 100
Subtract the new number by the original number
839 - 20 = 819
819 ÷ 20 = 40.95
40.95 x 100 = 4095%
Example