Ratio
Groups
Ratio notation and simplifying
What a ratio records, simplest form and 1 : n, and the fractions inside it.
Dividing in a ratio
Dividing a quantity into shares, working back from one part, and mixtures.
Combining and connecting ratios
Merging two ratios through a shared part, and the multiplier in every ratio.
Scale factors, maps and scale drawings
The multiplier linking a drawing or map to the real object, used both ways.
Similar shapes and scale factors
Length, area and volume factors of similar shapes, and choosing between them.