You can use proportions to find the answer.
20/100=?/11.95
20*11.95=239
239/100=2.39
So the discount takes $2.39 off of the original price.
11.95-2.39=9.56
7/100=?/9.56
7*9.56=66.92
66.93/100=0.6692
Round to nearest tenth: 0.67
9.56+0.67=10.23
The final cost of the CD is $10.23
