2278.57% is the change from 28 to 666
Calculation steps:
[( 666 - 28 ) ÷ 28] x 100 = 2278.57%
Formula
Percentage change = [(666 - 28) / 28] x 100
Subtract the new number by the original number
666 - 28 = 638
638 ÷ 28 = 22.785714285714285
22.785714285714285 x 100 = 2278.57%