-7.04% is the change from 710 to 660
Calculation steps:
[( 660 - 710 ) ÷ 710] x 100 = -7.04%
Formula
Percentage change = [(660 - 710) / 710] x 100
Subtract the new number by the original number
660 - 710 = -50
-50 ÷ 710 = -0.07042253521126761
-0.07042253521126761 x 100 = -7.04%