Year 8 · Mathematics and statistics · Number
Percentages and ratio
Any percentage of an amount, finding the whole, percentage swaps, increase and decrease, and sharing quantities in a ratio.
Everything for this topic in one place
- 3D lesson: Percentages and ratio — Use a 3D hundred-block and coloured block trains to find any percentage, work back to the whole, apply increases and decreases, and share amounts in a ratio.
- Teacher presentation — slides to put on the projector.
- Worksheets at three levels — Tūī (support), Kererū (core) and Kea (extension), each with an answer key on the last page.
- Online practice — assign it to your class in the Crateclass classroom and the results come back by themselves.
Written for Te Mātaiaho, Phase 3 (Years 7–8), with New Zealand places, money and native birds.
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More Year 8 maths topics
Powers of 10 and negative exponents · Prime factors, square and cube roots · Negative numbers and order of operations · Multiplying fractions and fractions of amounts · Budgets, discounts and finance plans · Linear equations and inequalities · Expanding, simplifying and factorising · Triangular, square and cube number patterns · Area, volume and unit conversions · Angles with parallel lines and circles · Transformations, enlargement and map scales · Statistical investigations, outliers and skew · Tree diagrams and probability experiments