-66.8% is the change from 967 to 321
Calculation steps:
[( 321 - 967 ) ÷ 967] x 100 = -66.8%
Formula
Percentage change = [(321 - 967) / 967] x 100
Subtract the new number by the original number
321 - 967 = -646
-646 ÷ 967 = -0.6680455015511892
-0.6680455015511892 x 100 = -66.8%