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