-66.88% is the change from 957 to 317
Calculation steps:
[( 317 - 957 ) ÷ 957] x 100 = -66.88%
Formula
Percentage change = [(317 - 957) / 957] x 100
Subtract the new number by the original number
317 - 957 = -640
-640 ÷ 957 = -0.6687565308254964
-0.6687565308254964 x 100 = -66.88%