62.31% is the change from 398 to 646
Calculation steps:
[( 646 - 398 ) ÷ 398] x 100 = 62.31%
Formula
Percentage change = [(646 - 398) / 398] x 100
Subtract the new number by the original number
646 - 398 = 248
248 ÷ 398 = 0.6231155778894473
0.6231155778894473 x 100 = 62.31%