15.9% is the change from 434 to 503
Calculation steps:
[( 503 - 434 ) ÷ 434] x 100 = 15.9%
Formula
Percentage change = [(503 - 434) / 434] x 100
Subtract the new number by the original number
503 - 434 = 69
69 ÷ 434 = 0.15898617511520738
0.15898617511520738 x 100 = 15.9%