-5.5% is the change from 709 to 670
Calculation steps:
[( 670 - 709 ) ÷ 709] x 100 = -5.5%
Formula
Percentage change = [(670 - 709) / 709] x 100
Subtract the new number by the original number
670 - 709 = -39
-39 ÷ 709 = -0.05500705218617771
-0.05500705218617771 x 100 = -5.5%