Solved on Feb 06, 2024

Find time difference in hours between Andrew (5235 \frac{2}{3} hours) and Vanessa (3453 \frac{4}{5} hours) taking a test. Express answer in mixed number form.

STEP 1

Assumptions
1. Andrew takes 5235 \frac{2}{3} hours to take a test.
2. Vanessa takes 3453 \frac{4}{5} hours to take the same test.
3. We need to find the time difference between Andrew's and Vanessa's test-taking durations.
4. The answer should be expressed in mixed number form and reduced if possible.

STEP 2

First, we need to convert the mixed numbers into improper fractions to make the calculations easier.
For Andrew's time: 523=5×3+23=15+23=1735 \frac{2}{3} = \frac{5 \times 3 + 2}{3} = \frac{15 + 2}{3} = \frac{17}{3}
For Vanessa's time: 345=3×5+45=15+45=1953 \frac{4}{5} = \frac{3 \times 5 + 4}{5} = \frac{15 + 4}{5} = \frac{19}{5}

STEP 3

Now, we will find the difference between the two times by subtracting Vanessa's time from Andrew's time.
Timedifference=AndrewstimeVanessastimeTime\, difference = Andrew's\, time - Vanessa's\, time

STEP 4

Before subtracting, we need to find a common denominator for the two fractions. The least common denominator (LCD) for 3 and 5 is 15.

STEP 5

Convert both fractions to have the common denominator of 15.
For Andrew's time: 173=17×53×5=8515\frac{17}{3} = \frac{17 \times 5}{3 \times 5} = \frac{85}{15}
For Vanessa's time: 195=19×35×3=5715\frac{19}{5} = \frac{19 \times 3}{5 \times 3} = \frac{57}{15}

STEP 6

Now we can subtract Vanessa's time from Andrew's time using the common denominator.
Timedifference=85155715Time\, difference = \frac{85}{15} - \frac{57}{15}

STEP 7

Perform the subtraction.
Timedifference=855715Time\, difference = \frac{85 - 57}{15}

STEP 8

Calculate the difference.
Timedifference=2815Time\, difference = \frac{28}{15}

STEP 9

Since the numerator is larger than the denominator, we can convert the improper fraction back into a mixed number.
Timedifference=11315Time\, difference = 1 \frac{13}{15}

STEP 10

The fraction 1315\frac{13}{15} is already in its simplest form, so no further reduction is necessary.
The time difference between Andrew's and Vanessa's test-taking durations is 113151 \frac{13}{15} hours.

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