307.18% is the change from 209 to 851
Calculation steps:
[( 851 - 209 ) ÷ 209] x 100 = 307.18%
Formula
Percentage change = [(851 - 209) / 209] x 100
Subtract the new number by the original number
851 - 209 = 642
642 ÷ 209 = 3.0717703349282295
3.0717703349282295 x 100 = 307.18%