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zhenek [66]
3 years ago
10

Lynne bought a bag of grapefruit,1 5/8 pound of apples and 2 3/16 pounds of bananas.The total weight of her purchases was 7 1/2

pounds.How much did the bag of grapefruit weigh?
Mathematics
1 answer:
lilavasa [31]3 years ago
6 0

Answer:

Weight of the bag of grapefruit = 3\frac{11}{16} pounds

Step-by-step explanation:

Given :

Total weight of fruits purchased by  Lynne = 7\frac{1}{2} pounds

Weight of apples purchased = 1\frac{5}{8} pounds

Weight of bananas =2\frac{3}{16} pounds

To find the wight of the bag of grapefruit bought.

Solution:

Weight of the bag of grapefruit can be calculated  by subtracting the weights of apples and bananas combined from the total weight.

Weight of apples and bananas combined = (1\frac{5}{8}+2\frac{3}{16}) pounds

Weight of the bag of grapefruit bought can be calculated as :

⇒ 7\frac{1}{2}-(1\frac{5}{8}+2\frac{3}{16})

Simplifying by removing parenthesis by reversing the sign after the negative.

⇒ 7\frac{1}{2}-1\frac{5}{8}-2\frac{3}{16}

Evaluating the whole numbers and fraction separately.

⇒ (7-1-2)+(\frac{1}{2}-\frac{5}{8}-\frac{3}{16})

⇒ (4)+(\frac{1}{2}-\frac{5}{8}-\frac{3}{16})

Taking LCD for 2,8,16 which is  = 16 as its the least common multiple.

Making the denominators common.

⇒ (4)+(\frac{1\times 8}{2\times 8}-\frac{5\times 2}{8\times 2}-\frac{3\times 1}{16\times 1})

⇒ (4)+(\frac{8}{16}-\frac{10}{16}-\frac{3}{16})

Combining the numerators.

⇒ (4)+(\frac{8-10-3}{16})

⇒ (4)+(\frac{-5}{16})

Making whole number to fraction to evaluate.

⇒  \frac{4}{1}-\frac{5}{16}

Taking LCD = 16

⇒  \frac{4\times 16}{1\times 16}-\frac{5}{16}

⇒  \frac{64}{16}-\frac{5}{16}

Combining the numerators.

⇒  \frac{64-5}{16}

⇒  \frac{59}{16}

Converting to mixed number.

⇒  3\frac{11}{16} pounds (Answer)

Weight of the bag of grapefruit = 3\frac{11}{16} pounds

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