15.66% is the change from 511 to 591
Calculation steps:
[( 591 - 511 ) ÷ 511] x 100 = 15.66%
Formula
Percentage change = [(591 - 511) / 511] x 100
Subtract the new number by the original number
591 - 511 = 80
80 ÷ 511 = 0.15655577299412915
0.15655577299412915 x 100 = 15.66%