-5.96% is the change from 688 to 647
Calculation steps:
[( 647 - 688 ) ÷ 688] x 100 = -5.96%
Formula
Percentage change = [(647 - 688) / 688] x 100
Subtract the new number by the original number
647 - 688 = -41
-41 ÷ 688 = -0.059593023255813955
-0.059593023255813955 x 100 = -5.96%