-31.49% is the change from 975 to 668
Calculation steps:
[( 668 - 975 ) ÷ 975] x 100 = -31.49%
Formula
Percentage change = [(668 - 975) / 975] x 100
Subtract the new number by the original number
668 - 975 = -307
-307 ÷ 975 = -0.3148717948717949
-0.3148717948717949 x 100 = -31.49%