-67.61% is the change from 957 to 310
Calculation steps:
[( 310 - 957 ) ÷ 957] x 100 = -67.61%
Formula
Percentage change = [(310 - 957) / 957] x 100
Subtract the new number by the original number
310 - 957 = -647
-647 ÷ 957 = -0.6760710553814002
-0.6760710553814002 x 100 = -67.61%