← 1.5 Rates, Ratio, Proportions and Percentages
Increase and decrease in a ratio
Mathematics · Grade 8 · about 40 minutes
Scaling a quantity up or down by multiplying by a ratio written as a fraction, and checking the direction.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- What a rate is
- Working out and comparing rates
- Expressing fractions as ratios
- Simplifying ratios
- Comparing two or more ratios
- Dividing a quantity in a ratio
- Increase and decrease in a ratio
- Percentage increase
- Percentage decrease and discount
- Percentage change in real life
- Direct proportion
- Indirect proportion
- Telling the two proportions apart
- Ratios and proportions in real life