26.3% is the change from 403 to 509
Calculation steps:
[( 509 - 403 ) ÷ 403] x 100 = 26.3%
Formula
Percentage change = [(509 - 403) / 403] x 100
Subtract the new number by the original number
509 - 403 = 106
106 ÷ 403 = 0.2630272952853598
0.2630272952853598 x 100 = 26.3%