Mathematics for IGCSE & O level - Ratio And Proportion (Section 2 - No. 26)
A recipe requires 2 cups of flour for every 3 cups of sugar. If you want to use 9 cups of sugar, how many cups of flour do you need?
4 cups
6 cups
9 cups
13.5 cups
Explanation
Flour:Sugar=2:3. 9 cups of sugar is 3*3, so 2*3=6
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