4145% is the change from 20 to 849
Calculation steps:
[( 849 - 20 ) ÷ 20] x 100 = 4145%
Formula
Percentage change = [(849 - 20) / 20] x 100
Subtract the new number by the original number
849 - 20 = 829
829 ÷ 20 = 41.45
41.45 x 100 = 4145%
Example