41.42% is the change from 309 to 437
Calculation steps:
[( 437 - 309 ) ÷ 309] x 100 = 41.42%
Formula
Percentage change = [(437 - 309) / 309] x 100
Subtract the new number by the original number
437 - 309 = 128
128 ÷ 309 = 0.41423948220064727
0.41423948220064727 x 100 = 41.42%