16.48% is the change from 437 to 509
Calculation steps:
[( 509 - 437 ) ÷ 437] x 100 = 16.48%
Formula
Percentage change = [(509 - 437) / 437] x 100
Subtract the new number by the original number
509 - 437 = 72
72 ÷ 437 = 0.16475972540045766
0.16475972540045766 x 100 = 16.48%