-67.08% is the change from 957 to 315
Calculation steps:
[( 315 - 957 ) ÷ 957] x 100 = -67.08%
Formula
Percentage change = [(315 - 957) / 957] x 100
Subtract the new number by the original number
315 - 957 = -642
-642 ÷ 957 = -0.670846394984326
-0.670846394984326 x 100 = -67.08%