305.24% is the change from 210 to 851
Calculation steps:
[( 851 - 210 ) ÷ 210] x 100 = 305.24%
Formula
Percentage change = [(851 - 210) / 210] x 100
Subtract the new number by the original number
851 - 210 = 641
641 ÷ 210 = 3.052380952380952
3.052380952380952 x 100 = 305.24%