-8.89% is the change from 709 to 646
Calculation steps:
[( 646 - 709 ) ÷ 709] x 100 = -8.89%
Formula
Percentage change = [(646 - 709) / 709] x 100
Subtract the new number by the original number
646 - 709 = -63
-63 ÷ 709 = -0.08885754583921016
-0.08885754583921016 x 100 = -8.89%