-30.71% is the change from 964 to 668
Calculation steps:
[( 668 - 964 ) ÷ 964] x 100 = -30.71%
Formula
Percentage change = [(668 - 964) / 964] x 100
Subtract the new number by the original number
668 - 964 = -296
-296 ÷ 964 = -0.3070539419087137
-0.3070539419087137 x 100 = -30.71%