-96.26% is the change from 321 to 12
Calculation steps:
[( 12 - 321 ) ÷ 321] x 100 = -96.26%
Formula
Percentage change = [(12 - 321) / 321] x 100
Subtract the new number by the original number
12 - 321 = -309
-309 ÷ 321 = -0.9626168224299065
-0.9626168224299065 x 100 = -96.26%