20.94% is the change from 511 to 618
Calculation steps:
[( 618 - 511 ) ÷ 511] x 100 = 20.94%
Formula
Percentage change = [(618 - 511) / 511] x 100
Subtract the new number by the original number
618 - 511 = 107
107 ÷ 511 = 0.20939334637964774
0.20939334637964774 x 100 = 20.94%