4155% is the change from 20 to 851
Calculation steps:
[( 851 - 20 ) ÷ 20] x 100 = 4155%
Formula
Percentage change = [(851 - 20) / 20] x 100
Subtract the new number by the original number
851 - 20 = 831
831 ÷ 20 = 41.55
41.55 x 100 = 4155%
Example