306.16% is the change from 211 to 857
Calculation steps:
[( 857 - 211 ) ÷ 211] x 100 = 306.16%
Formula
Percentage change = [(857 - 211) / 211] x 100
Subtract the new number by the original number
857 - 211 = 646
646 ÷ 211 = 3.061611374407583
3.061611374407583 x 100 = 306.16%