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The ratio of the weight of a book to the weight of a mug is 7:5. What fraction of the total weight of the book and mug is the weight of the book?

Respuesta :

sqdancefan

Answer:

  7/12

Step-by-step explanation:

You can pretend the given ratio units are the actual weights. Then the desired ratio is ...

  book : mug = 7 : 5

  book : (book +mug) = 7 : (7 +5) = 7 : 12

The weight of the book is 7/12 of the total weight.

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