4115% is the change from 20 to 843
Calculation steps:
[( 843 - 20 ) ÷ 20] x 100 = 4115%
Formula
Percentage change = [(843 - 20) / 20] x 100
Subtract the new number by the original number
843 - 20 = 823
823 ÷ 20 = 41.15
41.15 x 100 = 4115%
Example