23.46% is the change from 503 to 621
Calculation steps:
[( 621 - 503 ) ÷ 503] x 100 = 23.46%
Formula
Percentage change = [(621 - 503) / 503] x 100
Subtract the new number by the original number
621 - 503 = 118
118 ÷ 503 = 0.2345924453280318
0.2345924453280318 x 100 = 23.46%