-30.42% is the change from 960 to 668
Calculation steps:
[( 668 - 960 ) ÷ 960] x 100 = -30.42%
Formula
Percentage change = [(668 - 960) / 960] x 100
Subtract the new number by the original number
668 - 960 = -292
-292 ÷ 960 = -0.30416666666666664
-0.30416666666666664 x 100 = -30.42%