-31.31% is the change from 971 to 667
Calculation steps:
[( 667 - 971 ) ÷ 971] x 100 = -31.31%
Formula
Percentage change = [(667 - 971) / 971] x 100
Subtract the new number by the original number
667 - 971 = -304
-304 ÷ 971 = -0.31307929969104015
-0.31307929969104015 x 100 = -31.31%