Question #88fe7

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Answer 1 · 2018-01-04T16:29:14

Set up a proportion.

So the ratio is $5:9$ (blue:red) and it is asking you how many blue flags there are for $1800$ red flags $(x:1800)$

Here $x$ would be the number of blue flags.

You can solve this by seeing that $1800$ divided by $9$ is $200$ , and then multiply $200$ by $5$ (so there would be $1000$ blue flags)

Or you can set up an equation as

$5/9=x/1800$

You can then cross multiply

$9x=9000$

$x=1000$

So $1000$ blue flags.