71.68% is the change from 399 to 685
Calculation steps:
[( 685 - 399 ) ÷ 399] x 100 = 71.68%
Formula
Percentage change = [(685 - 399) / 399] x 100
Subtract the new number by the original number
685 - 399 = 286
286 ÷ 399 = 0.7167919799498746
0.7167919799498746 x 100 = 71.68%