-32.92% is the change from 966 to 648
Calculation steps:
[( 648 - 966 ) ÷ 966] x 100 = -32.92%
Formula
Percentage change = [(648 - 966) / 966] x 100
Subtract the new number by the original number
648 - 966 = -318
-318 ÷ 966 = -0.32919254658385094
-0.32919254658385094 x 100 = -32.92%