18.62% is the change from 521 to 618
Calculation steps:
[( 618 - 521 ) ÷ 521] x 100 = 18.62%
Formula
Percentage change = [(618 - 521) / 521] x 100
Subtract the new number by the original number
618 - 521 = 97
97 ÷ 521 = 0.18618042226487524
0.18618042226487524 x 100 = 18.62%