209.5% is the change from 221 to 684
Calculation steps:
[( 684 - 221 ) ÷ 221] x 100 = 209.5%
Formula
Percentage change = [(684 - 221) / 221] x 100
Subtract the new number by the original number
684 - 221 = 463
463 ÷ 221 = 2.0950226244343892
2.0950226244343892 x 100 = 209.5%