Ratio and Proportion

Sharing amounts, scaling recipes, and keeping quantities in step with each other.

Direct and Inverse Proportion

Understand direct and inverse proportion, and use the unitary method to solve both types of problem confidently.

Sharing in a Ratio

Learn how to divide an amount into a given ratio — add the parts, find the value of one part, then scale up for each share.

Simplifying and Writing Ratios

Learn what a ratio is, how to simplify one by dividing by common factors, and how to write it in 1:n form.