Ratios

What is a ratio?

A ratio is a way to compare amounts of something. Recipes, for example, are sometimes given as ratios. To make pastry you may need to mix 2 parts flour to 1 part fat. This means the ratio of flour to fat is 2:1.

If we are asked to write the ratio 2:5 in the form 1:n, we need to make the left-hand side of the…