-67.04% is the change from 971 to 320
Calculation steps:
[( 320 - 971 ) ÷ 971] x 100 = -67.04%
Formula
Percentage change = [(320 - 971) / 971] x 100
Subtract the new number by the original number
320 - 971 = -651
-651 ÷ 971 = -0.670442842430484
-0.670442842430484 x 100 = -67.04%