-9.75% is the change from 718 to 648
Calculation steps:
[( 648 - 718 ) ÷ 718] x 100 = -9.75%
Formula
Percentage change = [(648 - 718) / 718] x 100
Subtract the new number by the original number
648 - 718 = -70
-70 ÷ 718 = -0.09749303621169916
-0.09749303621169916 x 100 = -9.75%