80.16% is the change from 509 to 917
Calculation steps:
[( 917 - 509 ) ÷ 509] x 100 = 80.16%
Formula
Percentage change = [(917 - 509) / 509] x 100
Subtract the new number by the original number
917 - 509 = 408
408 ÷ 509 = 0.8015717092337917
0.8015717092337917 x 100 = 80.16%