56.21% is the change from 322 to 503
Calculation steps:
[( 503 - 322 ) ÷ 322] x 100 = 56.21%
Formula
Percentage change = [(503 - 322) / 322] x 100
Subtract the new number by the original number
503 - 322 = 181
181 ÷ 322 = 0.562111801242236
0.562111801242236 x 100 = 56.21%