-96.15% is the change from 312 to 12
Calculation steps:
[( 12 - 312 ) ÷ 312] x 100 = -96.15%
Formula
Percentage change = [(12 - 312) / 312] x 100
Subtract the new number by the original number
12 - 312 = -300
-300 ÷ 312 = -0.9615384615384616
-0.9615384615384616 x 100 = -96.15%