Sarah practices the piano 1/3 hour in the morning, 5/6 hour in the afternoon, and 4/5 hour in the evening.

How many hours did Sarah practice in all?

Enter your answer as a mixed number in simplest form by filling in the boxes.

1 answer

To find how many hours Sarah practiced in total, we will add the three time durations together:

  • Morning practice: \( \frac{1}{3} \) hour
  • Afternoon practice: \( \frac{5}{6} \) hour
  • Evening practice: \( \frac{4}{5} \) hour

First, we need to find a common denominator for all three fractions. The denominators are 3, 6, and 5. The least common multiple (LCM) of these numbers can be calculated:

  • The multiples of 3: 3, 6, 9, 12, 15
  • The multiples of 6: 6, 12, 18, 24
  • The multiples of 5: 5, 10, 15, 20

The smallest common multiple is 30.

Now, we will convert each fraction to have a denominator of 30:

  1. For \( \frac{1}{3} \): \[ \frac{1}{3} = \frac{1 \times 10}{3 \times 10} = \frac{10}{30} \]

  2. For \( \frac{5}{6} \): \[ \frac{5}{6} = \frac{5 \times 5}{6 \times 5} = \frac{25}{30} \]

  3. For \( \frac{4}{5} \): \[ \frac{4}{5} = \frac{4 \times 6}{5 \times 6} = \frac{24}{30} \]

Now we can add these fractions together: \[ \frac{10}{30} + \frac{25}{30} + \frac{24}{30} = \frac{10 + 25 + 24}{30} = \frac{59}{30} \]

Next, we convert \( \frac{59}{30} \) to a mixed number:

  • \( 30 \) goes into \( 59 \) one time (since \( 30 \times 1 = 30 \))
  • The remainder is \( 59 - 30 = 29 \)

Thus, we can express \( \frac{59}{30} \) as: \[ 1 \frac{29}{30} \]

Therefore, the total hours Sarah practiced in mixed number form is: \[ \boxed{1} \quad \boxed{\frac{29}{30}} \]