-9.63% is the change from 706 to 638
Calculation steps:
[( 638 - 706 ) ÷ 706] x 100 = -9.63%
Formula
Percentage change = [(638 - 706) / 706] x 100
Subtract the new number by the original number
638 - 706 = -68
-68 ÷ 706 = -0.09631728045325778
-0.09631728045325778 x 100 = -9.63%