17.81% is the change from 511 to 602
Calculation steps:
[( 602 - 511 ) ÷ 511] x 100 = 17.81%
Formula
Percentage change = [(602 - 511) / 511] x 100
Subtract the new number by the original number
602 - 511 = 91
91 ÷ 511 = 0.1780821917808219
0.1780821917808219 x 100 = 17.81%