-7.78% is the change from 720 to 664
Calculation steps:
[( 664 - 720 ) ÷ 720] x 100 = -7.78%
Formula
Percentage change = [(664 - 720) / 720] x 100
Subtract the new number by the original number
664 - 720 = -56
-56 ÷ 720 = -0.07777777777777778
-0.07777777777777778 x 100 = -7.78%