19.57% is the change from 511 to 611
Calculation steps:
[( 611 - 511 ) ÷ 511] x 100 = 19.57%
Formula
Percentage change = [(611 - 511) / 511] x 100
Subtract the new number by the original number
611 - 511 = 100
100 ÷ 511 = 0.19569471624266144
0.19569471624266144 x 100 = 19.57%