-32.67% is the change from 961 to 647
Calculation steps:
[( 647 - 961 ) ÷ 961] x 100 = -32.67%
Formula
Percentage change = [(647 - 961) / 961] x 100
Subtract the new number by the original number
647 - 961 = -314
-314 ÷ 961 = -0.3267429760665973
-0.3267429760665973 x 100 = -32.67%