-8.6% is the change from 709 to 648
Calculation steps:
[( 648 - 709 ) ÷ 709] x 100 = -8.6%
Formula
Percentage change = [(648 - 709) / 709] x 100
Subtract the new number by the original number
648 - 709 = -61
-61 ÷ 709 = -0.08603667136812412
-0.08603667136812412 x 100 = -8.6%