79.7% is the change from 399 to 717
Calculation steps:
[( 717 - 399 ) ÷ 399] x 100 = 79.7%
Formula
Percentage change = [(717 - 399) / 399] x 100
Subtract the new number by the original number
717 - 399 = 318
318 ÷ 399 = 0.7969924812030075
0.7969924812030075 x 100 = 79.7%