-67.69% is the change from 975 to 315
Calculation steps:
[( 315 - 975 ) ÷ 975] x 100 = -67.69%
Formula
Percentage change = [(315 - 975) / 975] x 100
Subtract the new number by the original number
315 - 975 = -660
-660 ÷ 975 = -0.676923076923077
-0.676923076923077 x 100 = -67.69%