63.1% is the change from 393 to 641
Calculation steps:
[( 641 - 393 ) ÷ 393] x 100 = 63.1%
Formula
Percentage change = [(641 - 393) / 393] x 100
Subtract the new number by the original number
641 - 393 = 248
248 ÷ 393 = 0.6310432569974554
0.6310432569974554 x 100 = 63.1%