-29.17% is the change from 960 to 680
Calculation steps:
[( 680 - 960 ) ÷ 960] x 100 = -29.17%
Formula
Percentage change = [(680 - 960) / 960] x 100
Subtract the new number by the original number
680 - 960 = -280
-280 ÷ 960 = -0.2916666666666667
-0.2916666666666667 x 100 = -29.17%