-6.57% is the change from 715 to 668
Calculation steps:
[( 668 - 715 ) ÷ 715] x 100 = -6.57%
Formula
Percentage change = [(668 - 715) / 715] x 100
Subtract the new number by the original number
668 - 715 = -47
-47 ÷ 715 = -0.06573426573426573
-0.06573426573426573 x 100 = -6.57%