78.19% is the change from 509 to 907
Calculation steps:
[( 907 - 509 ) ÷ 509] x 100 = 78.19%
Formula
Percentage change = [(907 - 509) / 509] x 100
Subtract the new number by the original number
907 - 509 = 398
398 ÷ 509 = 0.7819253438113949
0.7819253438113949 x 100 = 78.19%