279.76% is the change from 168 to 638
Calculation steps:
[( 638 - 168 ) ÷ 168] x 100 = 279.76%
Formula
Percentage change = [(638 - 168) / 168] x 100
Subtract the new number by the original number
638 - 168 = 470
470 ÷ 168 = 2.7976190476190474
2.7976190476190474 x 100 = 279.76%