Sam studied 1 29/40 hours more for history than math, solved using fraction subtraction, making option C, the right choice.
In the question, we are given that Sam studied 2 13/20 hours for her math test. She studied 4 3/8 hours for her history test.
We are asked to find how many more hours did she study for the history test.
The time she study for history test = 4 3/8 hours.
Converting the mixed fraction to an improper fraction we get, 4 3/8 hours = 35/8 hours.
The time she study for math test = 2 13/20 hours.
Converting the mixed fraction to an improper fraction we get, 2 13/20 hours = 53/20 hours.
To find the time for which Sam studies history more than math, we do fraction subtraction, to get:
35/8 - 53/20
= (35*5 - 53*2)/40 hours
= (175 - 106)/40 hours
= 69/40 hours
= 1 29/40 hours, converting to mixed fraction.
Thus, Sam studied 1 29/40 hours more for history than math, solved using fraction subtraction, making option C, the right choice.
Learn more about fractions at
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The provided question is incomplete. The complete question is:
Sam studied 2 13/20 hours for her math test. She studied 4 3/8 hours for her history test. How many more hours did she study for the history test? (Simplify the answer and write it as a mixed number.)
A. 6 41/40 hours
B. 2 29/40 hours
C. 1 29/40 hours
D. 2 11/40 hours.
