-31.58% is the change from 969 to 663
Calculation steps:
[( 663 - 969 ) ÷ 969] x 100 = -31.58%
Formula
Percentage change = [(663 - 969) / 969] x 100
Subtract the new number by the original number
663 - 969 = -306
-306 ÷ 969 = -0.3157894736842105
-0.3157894736842105 x 100 = -31.58%