The ratio of books to magazines at jess house is 5:3 they are 21 magazines at jess house how many books are there?

asked Oct 22, 2019 46.9k views

0 votes

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2 votes

It's the same as writing them as fractions

(5)/(3) = (x)/(21)

x= books

Cross multiply.
5×21
And
3×x

105 = 3x

divide 3 on both sides

x=35

5.3k points

4 votes

First, 5/3 = 1.6
21 x 1.6 = 34.99999999
But, when I put it in a calculator, the 1.6 was repeated so:
Round 34.99999999 to 35
35 books

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