49.51% is the change from 309 to 462
Calculation steps:
[( 462 - 309 ) ÷ 309] x 100 = 49.51%
Formula
Percentage change = [(462 - 309) / 309] x 100
Subtract the new number by the original number
462 - 309 = 153
153 ÷ 309 = 0.49514563106796117
0.49514563106796117 x 100 = 49.51%