Year 8 Maths
Fractions and Percentages
Percentage Increase and Decrease
20 practice questions
1 video lesson
Theory + worked examples
Percentage Increase and Decrease in NSW Year 8 maths (NESA outcome MA4‑FRC‑C‑01) treats the original amount as 100%. A rise of 12% means multiplying by 1.12, and a fall of 30% means multiplying by 0.7.
You will increase and decrease amounts in one step or two, read a multiplier backwards (\(\times 0.85\) is a 15% decrease), find the percentage change between two prices and work out profit on a bike or a house. You will also see why two 10% rises are not a 20% rise and why a 25% rise then a 25% fall does not get you back to the start, then work backwards to an original price. It is part of Year 8 Fractions and Percentages.
Practice
20 questions
Practice questions
Every question with a fully worked solution.
Watch
1 video(s)
- Percentage Increase and Decrease - Video - Percentage Increase and Decrease 2 Watch
Theory
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