-7.94% is the change from 693 to 638
Calculation steps:
[( 638 - 693 ) ÷ 693] x 100 = -7.94%
Formula
Percentage change = [(638 - 693) / 693] x 100
Subtract the new number by the original number
638 - 693 = -55
-55 ÷ 693 = -0.07936507936507936
-0.07936507936507936 x 100 = -7.94%