71.51% is the change from 509 to 873
Calculation steps:
[( 873 - 509 ) ÷ 509] x 100 = 71.51%
Formula
Percentage change = [(873 - 509) / 509] x 100
Subtract the new number by the original number
873 - 509 = 364
364 ÷ 509 = 0.7151277013752456
0.7151277013752456 x 100 = 71.51%