2178.57% is the change from 28 to 638
Calculation steps:
[( 638 - 28 ) ÷ 28] x 100 = 2178.57%
Formula
Percentage change = [(638 - 28) / 28] x 100
Subtract the new number by the original number
638 - 28 = 610
610 ÷ 28 = 21.785714285714285
21.785714285714285 x 100 = 2178.57%