Question

If 6 books cost £18, how much would 7 books cost?

Answer 1

`£21`

Explanation:

First, you need to find out the price of one book. If `6` books cost `£18`, then to find one book...

`(£18) / 6 = £3`

Now that you know that one book costs `£3`, finding the price of `7` books is quite easy...

`£3 xx 7 = £21`