-66.49% is the change from 958 to 321
Calculation steps:
[( 321 - 958 ) ÷ 958] x 100 = -66.49%
Formula
Percentage change = [(321 - 958) / 958] x 100
Subtract the new number by the original number
321 - 958 = -637
-637 ÷ 958 = -0.6649269311064718
-0.6649269311064718 x 100 = -66.49%