-66.77% is the change from 963 to 320
Calculation steps:
[( 320 - 963 ) ÷ 963] x 100 = -66.77%
Formula
Percentage change = [(320 - 963) / 963] x 100
Subtract the new number by the original number
320 - 963 = -643
-643 ÷ 963 = -0.667705088265836
-0.667705088265836 x 100 = -66.77%