19.18% is the change from 511 to 609
Calculation steps:
[( 609 - 511 ) ÷ 511] x 100 = 19.18%
Formula
Percentage change = [(609 - 511) / 511] x 100
Subtract the new number by the original number
609 - 511 = 98
98 ÷ 511 = 0.1917808219178082
0.1917808219178082 x 100 = 19.18%