-96.19% is the change from 315 to 12
Calculation steps:
[( 12 - 315 ) ÷ 315] x 100 = -96.19%
Formula
Percentage change = [(12 - 315) / 315] x 100
Subtract the new number by the original number
12 - 315 = -303
-303 ÷ 315 = -0.9619047619047619
-0.9619047619047619 x 100 = -96.19%