41.1% is the change from 219 to 309
Calculation steps:
[( 309 - 219 ) ÷ 219] x 100 = 41.1%
Formula
Percentage change = [(309 - 219) / 219] x 100
Subtract the new number by the original number
309 - 219 = 90
90 ÷ 219 = 0.410958904109589
0.410958904109589 x 100 = 41.1%