82.71% is the change from 509 to 930
Calculation steps:
[( 930 - 509 ) ÷ 509] x 100 = 82.71%
Formula
Percentage change = [(930 - 509) / 509] x 100
Subtract the new number by the original number
930 - 509 = 421
421 ÷ 509 = 0.8271119842829077
0.8271119842829077 x 100 = 82.71%