Answer:
7/8 of an hour
Explanation:
We multiply the total of the movie, 3 1/2 hours, by the fraction she watched, 1/4:
1/4(3 1/2)
To multiply these, we convert the mixed number to an improper fraction. We multiply the whole number, 3, by the denominator, 2; this gives us 6. We add the numerator, 1; this gives us 7. This makes it 7/2:
1/4(7/2)
To multiply fractions, we multiply straight across:
(1*7)/(4*2) = 7/8