-10.01% is the change from 709 to 638
Calculation steps:
[( 638 - 709 ) ÷ 709] x 100 = -10.01%
Formula
Percentage change = [(638 - 709) / 709] x 100
Subtract the new number by the original number
638 - 709 = -71
-71 ÷ 709 = -0.1001410437235543
-0.1001410437235543 x 100 = -10.01%