-31.01% is the change from 961 to 663
Calculation steps:
[( 663 - 961 ) ÷ 961] x 100 = -31.01%
Formula
Percentage change = [(663 - 961) / 961] x 100
Subtract the new number by the original number
663 - 961 = -298
-298 ÷ 961 = -0.3100936524453694
-0.3100936524453694 x 100 = -31.01%