-5.76% is the change from 677 to 638
Calculation steps:
[( 638 - 677 ) ÷ 677] x 100 = -5.76%
Formula
Percentage change = [(638 - 677) / 677] x 100
Subtract the new number by the original number
638 - 677 = -39
-39 ÷ 677 = -0.05760709010339734
-0.05760709010339734 x 100 = -5.76%