-67.6% is the change from 960 to 311
Calculation steps:
[( 311 - 960 ) ÷ 960] x 100 = -67.6%
Formula
Percentage change = [(311 - 960) / 960] x 100
Subtract the new number by the original number
311 - 960 = -649
-649 ÷ 960 = -0.6760416666666667
-0.6760416666666667 x 100 = -67.6%