Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 1)
A recipe for cookies uses flour and sugar in the ratio 5:2. If you use 100 grams of flour, how much sugar do you need?
20 g
40 g
50 g
250 g
説明
If 5 parts flour corresponds to 100g, then 1 part is 20g. Sugar is 2 parts, so 2*20g = 40g.