NECTA Form 1–4 (CSEE) · Form 1 · Basic Mathematics (Form 1) · Notes · Unit 4: Ratio, Proportion and Financial Arithmetic

Unit 4: Ratio, Proportion and Financial Arithmetic

Comprehensive NECTA Form 1 Basic Mathematics revision notes covering the concept of ratio, simplifying fractional and decimal ratios, dividing quantities in given ratios, increasing/decreasing in ratios, compound ratios, direct and inverse proportion (algebraic formulation and graphical characteristics), compound proportion (worker-time-output rates), scale drawings, representative fractions and area scale factors, financial arithmetic (cost price, selling price, profit/loss percentages, markup, discounts, commission, simple interest, VAT, and foreign currency conversions) with full NECTA practice problems and marking schemes.