7875% is the change from 8 to 638
Calculation steps:
[( 638 - 8 ) ÷ 8] x 100 = 7875%
Formula
Percentage change = [(638 - 8) / 8] x 100
Subtract the new number by the original number
638 - 8 = 630
630 ÷ 8 = 78.75
78.75 x 100 = 7875%
Example