-6.46% is the change from 681 to 637
Calculation steps:
[( 637 - 681 ) ÷ 681] x 100 = -6.46%
Formula
Percentage change = [(637 - 681) / 681] x 100
Subtract the new number by the original number
637 - 681 = -44
-44 ÷ 681 = -0.06461086637298091
-0.06461086637298091 x 100 = -6.46%