-66.77% is the change from 966 to 321
Calculation steps:
[( 321 - 966 ) ÷ 966] x 100 = -66.77%
Formula
Percentage change = [(321 - 966) / 966] x 100
Subtract the new number by the original number
321 - 966 = -645
-645 ÷ 966 = -0.6677018633540373
-0.6677018633540373 x 100 = -66.77%