62.94% is the change from 394 to 642
Calculation steps:
[( 642 - 394 ) ÷ 394] x 100 = 62.94%
Formula
Percentage change = [(642 - 394) / 394] x 100
Subtract the new number by the original number
642 - 394 = 248
248 ÷ 394 = 0.6294416243654822
0.6294416243654822 x 100 = 62.94%