18.45% is the change from 309 to 366
Calculation steps:
[( 366 - 309 ) ÷ 309] x 100 = 18.45%
Formula
Percentage change = [(366 - 309) / 309] x 100
Subtract the new number by the original number
366 - 309 = 57
57 ÷ 309 = 0.18446601941747573
0.18446601941747573 x 100 = 18.45%