SOLUTION: A baby weighs 7 1/8 pounds at birth. After four months, the baby weighs 15 2/3 pounds. How much weight did the baby gain? Thanks! Please work really really reall

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Question 64995This question is from textbook Pre-Algebra
: A baby weighs 7 1/8 pounds at birth. After four months, the baby weighs 15 2/3 pounds. How much weight did the baby gain?

Thanks! Please work really really really fast! Happy Holidays! This question is from textbook Pre-Algebra

Answer by funmath(2933) (Show Source):
You can put this solution on YOUR website!
A baby weighs 7 1/8 pounds at birth. After four months, the baby weighs 15 2/3 pounds. How much weight did the baby gain?
Subtract the birth weight from the weight after four months. In order to subtract fractions you need a common denominator. In this case 3 and 8 have no common factors so the LCD is 3*8=24. Whatever you do to the denominator to get that you also have to do to the numerator:
15 2/3 - 7 1/8
15 2*8/(3*8) - 7 1*3/(8*3)
15 16/24 - 7 3/24 Subtract the whole number and fractions.
(15-7) (16-3)/24
8 13/24 pounds
Happy Calculating!!!