81.73% is the change from 509 to 925
Calculation steps:
[( 925 - 509 ) ÷ 509] x 100 = 81.73%
Formula
Percentage change = [(925 - 509) / 509] x 100
Subtract the new number by the original number
925 - 509 = 416
416 ÷ 509 = 0.8172888015717092
0.8172888015717092 x 100 = 81.73%