Ratio and proportion calculators for GCSE maths and beyond. Simplify two-part and three-part ratios, share amounts in a given ratio, solve direct and inverse proportion problems using the unitary method — all with the step-by-step working examiners expect.

Unlike calculators that show only the final answer, every Pythagorist tool displays the complete method — the same working you would write in an exam. This means you can understand the process, not just copy a number. Students who understand the method score more marks, because examiners award points for correct working even when the final answer contains an arithmetic error.