-67.81% is the change from 960 to 309
Calculation steps:
[( 309 - 960 ) ÷ 960] x 100 = -67.81%
Formula
Percentage change = [(309 - 960) / 960] x 100
Subtract the new number by the original number
309 - 960 = -651
-651 ÷ 960 = -0.678125
-0.678125 x 100 = -67.81%