Question

Question #88fe7

Answer 1

Set up a proportion.

Explanation:

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.