80.35% is the change from 509 to 918
Calculation steps:
[( 918 - 509 ) ÷ 509] x 100 = 80.35%
Formula
Percentage change = [(918 - 509) / 509] x 100
Subtract the new number by the original number
918 - 509 = 409
409 ÷ 509 = 0.8035363457760314
0.8035363457760314 x 100 = 80.35%