What proportion means
What proportion means
In proportion questions, two variables are linked by a fixed number called the constant of proportionality, usually kkk. Your first job is to turn the words into an equation.
Step-by-step lessons on Edexcel IGCSE Maths Direct and Inverse Proportion. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.