Benny was told to practice playing piano for 4/11 of an hour per day. benny has already played 3/14 of an hour today. how many hours does benny still need to practice today? what are the given facts? what is asked in the problem? what is the hidden question? what are the operations to be used? what is the nuber sentence? what is the answer to the problem? ( answer. if you answer, you very much! )