728.57% is the change from 77 to 638
Calculation steps:
[( 638 - 77 ) ÷ 77] x 100 = 728.57%
Formula
Percentage change = [(638 - 77) / 77] x 100
Subtract the new number by the original number
638 - 77 = 561
561 ÷ 77 = 7.285714285714286
7.285714285714286 x 100 = 728.57%