102.39% is the change from 209 to 423
Calculation steps:
[( 423 - 209 ) ÷ 209] x 100 = 102.39%
Formula
Percentage change = [(423 - 209) / 209] x 100
Subtract the new number by the original number
423 - 209 = 214
214 ÷ 209 = 1.0239234449760766
1.0239234449760766 x 100 = 102.39%