-8.07% is the change from 694 to 638
Calculation steps:
[( 638 - 694 ) ÷ 694] x 100 = -8.07%
Formula
Percentage change = [(638 - 694) / 694] x 100
Subtract the new number by the original number
638 - 694 = -56
-56 ÷ 694 = -0.08069164265129683
-0.08069164265129683 x 100 = -8.07%