15.1% is the change from 437 to 503
Calculation steps:
[( 503 - 437 ) ÷ 437] x 100 = 15.1%
Formula
Percentage change = [(503 - 437) / 437] x 100
Subtract the new number by the original number
503 - 437 = 66
66 ÷ 437 = 0.15102974828375287
0.15102974828375287 x 100 = 15.1%