71.86% is the change from 398 to 684
Calculation steps:
[( 684 - 398 ) ÷ 398] x 100 = 71.86%
Formula
Percentage change = [(684 - 398) / 398] x 100
Subtract the new number by the original number
684 - 398 = 286
286 ÷ 398 = 0.7185929648241206
0.7185929648241206 x 100 = 71.86%