81.53% is the change from 509 to 924
Calculation steps:
[( 924 - 509 ) ÷ 509] x 100 = 81.53%
Formula
Percentage change = [(924 - 509) / 509] x 100
Subtract the new number by the original number
924 - 509 = 415
415 ÷ 509 = 0.8153241650294696
0.8153241650294696 x 100 = 81.53%