-31.34% is the change from 970 to 666
Calculation steps:
[( 666 - 970 ) ÷ 970] x 100 = -31.34%
Formula
Percentage change = [(666 - 970) / 970] x 100
Subtract the new number by the original number
666 - 970 = -304
-304 ÷ 970 = -0.3134020618556701
-0.3134020618556701 x 100 = -31.34%