-31.07% is the change from 972 to 670
Calculation steps:
[( 670 - 972 ) ÷ 972] x 100 = -31.07%
Formula
Percentage change = [(670 - 972) / 972] x 100
Subtract the new number by the original number
670 - 972 = -302
-302 ÷ 972 = -0.31069958847736623
-0.31069958847736623 x 100 = -31.07%