20.08% is the change from 503 to 604
Calculation steps:
[( 604 - 503 ) ÷ 503] x 100 = 20.08%
Formula
Percentage change = [(604 - 503) / 503] x 100
Subtract the new number by the original number
604 - 503 = 101
101 ÷ 503 = 0.20079522862823063
0.20079522862823063 x 100 = 20.08%