What we need to do is find out what one ratio is worth. To do that you do:

You know that 150 grams of raisin is the same as '3'. To work out what '1' is worth, you do 150/3, which gives you 50. Now you know 1 unit is worth 50.

So, since you need 5 units of sultanas, you just do 5 times 50. That means you need 250 sultanas for every 150 raisins :)

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Sheena Nguyen
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2 years ago


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