-34.95% is the change from 970 to 631
Calculation steps:
[( 631 - 970 ) ÷ 970] x 100 = -34.95%
Formula
Percentage change = [(631 - 970) / 970] x 100
Subtract the new number by the original number
631 - 970 = -339
-339 ÷ 970 = -0.3494845360824742
-0.3494845360824742 x 100 = -34.95%