REVISION NOTES
IGCSE Edexcel Mathematics A
1.7 Ratio and Proportion
1.7.1 Use ratio notation, including reduction to its simplest form and its various links to fraction notation
Simple ratios may be expressed using whole numbers.
Ratios may be cancelled down in a similar way to fractions.
Example: 4 : 6 = 2 : 3
1.7.2 Divide a quantity in a given ratio or ratios
1.7.3 Use the process of proportionality to evaluate unknown quantities
1.7.4 Calculate an unknown quantity from quantities that vary in direct proportion
1.7.5 Solve word problems about ratio and proportion
