-31.03% is the change from 970 to 669
Calculation steps:
[( 669 - 970 ) ÷ 970] x 100 = -31.03%
Formula
Percentage change = [(669 - 970) / 970] x 100
Subtract the new number by the original number
669 - 970 = -301
-301 ÷ 970 = -0.31030927835051547
-0.31030927835051547 x 100 = -31.03%