-6.45% is the change from 682 to 638
Calculation steps:
[( 638 - 682 ) ÷ 682] x 100 = -6.45%
Formula
Percentage change = [(638 - 682) / 682] x 100
Subtract the new number by the original number
638 - 682 = -44
-44 ÷ 682 = -0.06451612903225806
-0.06451612903225806 x 100 = -6.45%