-7.69% is the change from 715 to 660
Calculation steps:
[( 660 - 715 ) ÷ 715] x 100 = -7.69%
Formula
Percentage change = [(660 - 715) / 715] x 100
Subtract the new number by the original number
660 - 715 = -55
-55 ÷ 715 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%