3942.86% is the change from 21 to 849
Calculation steps:
[( 849 - 21 ) ÷ 21] x 100 = 3942.86%
Formula
Percentage change = [(849 - 21) / 21] x 100
Subtract the new number by the original number
849 - 21 = 828
828 ÷ 21 = 39.42857142857143
39.42857142857143 x 100 = 3942.86%