-8.1% is the change from 704 to 647
Calculation steps:
[( 647 - 704 ) ÷ 704] x 100 = -8.1%
Formula
Percentage change = [(647 - 704) / 704] x 100
Subtract the new number by the original number
647 - 704 = -57
-57 ÷ 704 = -0.08096590909090909
-0.08096590909090909 x 100 = -8.1%