129.5% is the change from 278 to 638
Calculation steps:
[( 638 - 278 ) ÷ 278] x 100 = 129.5%
Formula
Percentage change = [(638 - 278) / 278] x 100
Subtract the new number by the original number
638 - 278 = 360
360 ÷ 278 = 1.2949640287769784
1.2949640287769784 x 100 = 129.5%