Math
There are several ways to do this question.
One way is to set it up as a ratio. The key is to keep the same type of numbers on the top and bottom.
empty bottles 10 200
----- = ------
drinks 1 x
You can cross-multiply or multiply both sides by x and we get 10x = 200. Isolating x by dividing both sides by 10, we end up with x = 20.
Good luck,
Paul
If you have 200 bottles then you'll get 20 drinks.
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