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21 October, 15:16

Jessica drank 1/8 gallon of orange juice and her brother Sam drank 1/3 of the same gallon. How much of the gallon of orange juice did they drink?

a) 1/11 gal.

b) 2/11 gal.

c) 11/24 gal.

d) 15/24 gal.

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Answers (2)
  1. 21 October, 15:21
    0
    Okay, to first find how many the two drank you have to add the fractions together. The lcm of 8 and 3 is 24,

    1/3 x 8/8 = 8/24

    1/8 x 3/3 = 3/24

    so you add 3/24 and 8/24, which gets you 11/24 gal, [c]
  2. 21 October, 15:44
    0
    To do this problem make both of them have the same denomnator. Try to find the smallest number by seeing the smallest multiple 8 and 3 have in common. This would be 24 since thats the smallest number they have in common.

    For 1/8 to get 24 in the denominator multiply top and bottom by 3 to get 3/24

    For 1/3 to get 24 in the denomnator multiply top and bottom by 8 to get 8/24

    We need 24 in both denominators to add them became same denominators allow us to add the numerators

    3/24 + 8/24=11/24 since 8+3=11 in the denominator

    The answer is c
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