-32.71% is the change from 960 to 646
Calculation steps:
[( 646 - 960 ) ÷ 960] x 100 = -32.71%
Formula
Percentage change = [(646 - 960) / 960] x 100
Subtract the new number by the original number
646 - 960 = -314
-314 ÷ 960 = -0.32708333333333334
-0.32708333333333334 x 100 = -32.71%