47.85% is the change from 209 to 309
Calculation steps:
[( 309 - 209 ) ÷ 209] x 100 = 47.85%
Formula
Percentage change = [(309 - 209) / 209] x 100
Subtract the new number by the original number
309 - 209 = 100
100 ÷ 209 = 0.4784688995215311
0.4784688995215311 x 100 = 47.85%