17.52% is the change from 428 to 503
Calculation steps:
[( 503 - 428 ) ÷ 428] x 100 = 17.52%
Formula
Percentage change = [(503 - 428) / 428] x 100
Subtract the new number by the original number
503 - 428 = 75
75 ÷ 428 = 0.17523364485981308
0.17523364485981308 x 100 = 17.52%