20.74% is the change from 511 to 617
Calculation steps:
[( 617 - 511 ) ÷ 511] x 100 = 20.74%
Formula
Percentage change = [(617 - 511) / 511] x 100
Subtract the new number by the original number
617 - 511 = 106
106 ÷ 511 = 0.20743639921722112
0.20743639921722112 x 100 = 20.74%