# apt4Maths: PowerPoint Presentation on Ratios and Proportion – Ratio Division – for GCSE (and Key Stage 3) Mathematics

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This is the 3rd PowerPoint Presentation only of the full set of 8 PowerPoint Presentations on Ratios and Proportion for GCSE (and Key Stage 3) Maths. This PowerPoint explains how to express ratios as fractions and how to divide an amount in a given ratio.

The full set of 8 PowerPoint Presentations on Ratios and Proportion can be purchased from www.apt-initiatives.com

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The full set of 8 PowerPoint Presentations on Ratios and Proportion (101 slides, excluding Title Pages) covers the following topics:

• 01 Ratios – An Introduction (15 slides): Explains what a ratio is, how it is written, how a ratio can be simplified or an equivalent ratio can be found.
• 02 Using Ratios (16 slides): Reviews simplifying ratios and finding equivalent ratios, before explaining how to use ratios to solve problems and how to find unitary ratios.
• 03 Ratio Division (9 slides): Explains how to express ratios as fractions and how to divide an amount in a given ratio. INCLUDED in this download
• 04 Direct Proportion – Exchange Rate Problems (12 slides): Explains how to solve direct proportion problems in the context of exchange rates.
• 05 Direct Proportion – Best Buy Problems (13 slides): Explains how to solve direct proportion problems in the context of best buy situations.
• 06 Direct Proportion – Recipe-style Problems (10 slides): Explains how to solve direct proportion problems in the context of recipes.
• 07 Inverse Proportion (10 slides): Explains how to solve inverse proportion problems.
• 08 Proportionality (16 slides): Explains direct and inverse proportionality, how to find the constant in proportionality equations, how to solve proportionality problems, and what proportionality looks like on graphs.