-96.13% is the change from 310 to 12
Calculation steps:
[( 12 - 310 ) ÷ 310] x 100 = -96.13%
Formula
Percentage change = [(12 - 310) / 310] x 100
Subtract the new number by the original number
12 - 310 = -298
-298 ÷ 310 = -0.9612903225806452
-0.9612903225806452 x 100 = -96.13%