67.58% is the change from 509 to 853
Calculation steps:
[( 853 - 509 ) ÷ 509] x 100 = 67.58%
Formula
Percentage change = [(853 - 509) / 509] x 100
Subtract the new number by the original number
853 - 509 = 344
344 ÷ 509 = 0.6758349705304518
0.6758349705304518 x 100 = 67.58%