-34.33% is the change from 970 to 637
Calculation steps:
[( 637 - 970 ) ÷ 970] x 100 = -34.33%
Formula
Percentage change = [(637 - 970) / 970] x 100
Subtract the new number by the original number
637 - 970 = -333
-333 ÷ 970 = -0.34329896907216495
-0.34329896907216495 x 100 = -34.33%