-66.03% is the change from 945 to 321
Calculation steps:
[( 321 - 945 ) ÷ 945] x 100 = -66.03%
Formula
Percentage change = [(321 - 945) / 945] x 100
Subtract the new number by the original number
321 - 945 = -624
-624 ÷ 945 = -0.6603174603174603
-0.6603174603174603 x 100 = -66.03%