Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 33)
If a recipe uses 3 eggs for every 4 cups of flour, how many eggs are needed for 12 cups of flour?
6
9
12
16
คำอธิบาย
4 cups flour needs 3 eggs. To get 12 cups of flour, you need to multiply the flour by 3, so also the egg quantity = 3*3 = 9.