33.4% is the change from 509 to 679
Calculation steps:
[( 679 - 509 ) ÷ 509] x 100 = 33.4%
Formula
Percentage change = [(679 - 509) / 509] x 100
Subtract the new number by the original number
679 - 509 = 170
170 ÷ 509 = 0.33398821218074654
0.33398821218074654 x 100 = 33.4%