-67.19% is the change from 960 to 315
Calculation steps:
[( 315 - 960 ) ÷ 960] x 100 = -67.19%
Formula
Percentage change = [(315 - 960) / 960] x 100
Subtract the new number by the original number
315 - 960 = -645
-645 ÷ 960 = -0.671875
-0.671875 x 100 = -67.19%