Mathematics for IGCSE & O level - Ratio And Proportion (Section 6 - No. 28)

If the ratio of flour to sugar in a cake recipe is 4:1. What's true?

For every 4 grams of flour, 1 gram of sugar is used.

For every 1 gram of flour, 4 grams of sugar are used.

Flour makes up 80% of the mixture.

Sugar makes up 20% of the mixture.

4 parts flour and 1 part sugar. Sugar = 1/5 = 20% and flour 4/5=80%