-9.34% is the change from 728 to 660
Calculation steps:
[( 660 - 728 ) ÷ 728] x 100 = -9.34%
Formula
Percentage change = [(660 - 728) / 728] x 100
Subtract the new number by the original number
660 - 728 = -68
-68 ÷ 728 = -0.09340659340659341
-0.09340659340659341 x 100 = -9.34%