18% is the change from 511 to 603
Calculation steps:
[( 603 - 511 ) ÷ 511] x 100 = 18%
Formula
Percentage change = [(603 - 511) / 511] x 100
Subtract the new number by the original number
603 - 511 = 92
92 ÷ 511 = 0.18003913894324852
0.18003913894324852 x 100 = 18%