53.35% is the change from 328 to 503
Calculation steps:
[( 503 - 328 ) ÷ 328] x 100 = 53.35%
Formula
Percentage change = [(503 - 328) / 328] x 100
Subtract the new number by the original number
503 - 328 = 175
175 ÷ 328 = 0.5335365853658537
0.5335365853658537 x 100 = 53.35%