-96.3% is the change from 324 to 12
Calculation steps:
[( 12 - 324 ) ÷ 324] x 100 = -96.3%
Formula
Percentage change = [(12 - 324) / 324] x 100
Subtract the new number by the original number
12 - 324 = -312
-312 ÷ 324 = -0.9629629629629629
-0.9629629629629629 x 100 = -96.3%