127.86% is the change from 280 to 638
Calculation steps:
[( 638 - 280 ) ÷ 280] x 100 = 127.86%
Formula
Percentage change = [(638 - 280) / 280] x 100
Subtract the new number by the original number
638 - 280 = 358
358 ÷ 280 = 1.2785714285714285
1.2785714285714285 x 100 = 127.86%