68.78% is the change from 378 to 638
Calculation steps:
[( 638 - 378 ) ÷ 378] x 100 = 68.78%
Formula
Percentage change = [(638 - 378) / 378] x 100
Subtract the new number by the original number
638 - 378 = 260
260 ÷ 378 = 0.6878306878306878
0.6878306878306878 x 100 = 68.78%