79.37% is the change from 509 to 913
Calculation steps:
[( 913 - 509 ) ÷ 509] x 100 = 79.37%
Formula
Percentage change = [(913 - 509) / 509] x 100
Subtract the new number by the original number
913 - 509 = 404
404 ÷ 509 = 0.793713163064833
0.793713163064833 x 100 = 79.37%