Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 6)
A recipe for cookies calls for butter and flour in the ratio 2:3. If you have 120 grams of flour, how much butter is needed?
60g
80g
100g
180g
Explanation
Butter:Flour = 2:3. 120g of flour means 3*40. 2*40 = 80
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