-7.13% is the change from 715 to 664
Calculation steps:
[( 664 - 715 ) ÷ 715] x 100 = -7.13%
Formula
Percentage change = [(664 - 715) / 715] x 100
Subtract the new number by the original number
664 - 715 = -51
-51 ÷ 715 = -0.07132867132867132
-0.07132867132867132 x 100 = -7.13%