18.09% is the change from 503 to 594
Calculation steps:
[( 594 - 503 ) ÷ 503] x 100 = 18.09%
Formula
Percentage change = [(594 - 503) / 503] x 100
Subtract the new number by the original number
594 - 503 = 91
91 ÷ 503 = 0.18091451292246521
0.18091451292246521 x 100 = 18.09%