-96.46% is the change from 339 to 12
Calculation steps:
[( 12 - 339 ) ÷ 339] x 100 = -96.46%
Formula
Percentage change = [(12 - 339) / 339] x 100
Subtract the new number by the original number
12 - 339 = -327
-327 ÷ 339 = -0.9646017699115044
-0.9646017699115044 x 100 = -96.46%