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A recipe for pastry has flour, butter and water mixed in the ratio 24 : 8 : 3
If Fiona follows the recipe and uses 3 cups of flour, how many cups of butter should she use?
1 cup of butter.
Start with 24 : 8 : 3
Fiona uses 3 cups of flour, not 24, and 24/3=8 so let's divide all values by 8:
So 1 cup of butter should be used.