Answer: 6 11/12 hours
Explanation:
First lets change all these fraction to have the same denominator to its easier to solve
Total time- 9 6/12 hours
Lip synch- 1 2/12 hours
Learn dance steps- 1 4/12
Nest lets add the amount of time it takes for her to lip synch and learn the steps. 1 4/12 + 1 3/12 = 2 7/12
Next lets subtract this number from the total amount of time
9 6/12 - 2 7/12
You can change it into an improper fraction if you like
114/12 - 31/12 = 83/12 or 6 11/12