30.62% is the change from 503 to 657
Calculation steps:
[( 657 - 503 ) ÷ 503] x 100 = 30.62%
Formula
Percentage change = [(657 - 503) / 503] x 100
Subtract the new number by the original number
657 - 503 = 154
154 ÷ 503 = 0.3061630218687873
0.3061630218687873 x 100 = 30.62%