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This Key Stage 3 Percentages scheme of work is designed for Year 8 work on finding percentages without a calculator, expressing one number as a percentage of another, percentage change with multipliers, and simple interest.
Use this page to sequence the lessons below, connect fractions and decimals to percentage notation, and apply decimal multipliers before students tackle financial problems with interest.
Last updated: May 2026
For more schemes and topic routes across KS3, GCSE and A-Level, browse the Mr Mathematics Curriculum Hub.
Read the prerequisite and key-concept cards first so fractions, decimals and basic percentage equivalence are secure. Teach the lessons in the order listed unless your timetable requires otherwise — keep Finding Percentages without a Calculator before Expressing One Number as a Percentage of Another, teach Calculating a Percentage Change before Calculating a Simple Interest, and ensure decimal multipliers are fluent before financial problems.
Presentations, worksheets, question generators and video tutorials for the lessons in this unit are available to members. Explore Mr Mathematics membership if you need full access to the library and schemes of work.
If you are comparing options for a department, the membership page sets out exactly what is included so you can align this unit with your wider three-year Key Stage 3 number plan.
Students should be secure with the following before this unit.
Ideas to keep explicit while students work with percentages.
How this unit supports fluency, reasoning and problem solving in Key Stage 3.
Typical slips to address during teaching and marking.
Use it to sequence teaching, align vocabulary and spot likely errors before they become habits. Then use the lessons below as the delivery route for the unit.
They need secure equivalence between fractions, decimals and percentages, and confidence using fractions and percentages as operators so new work focuses on multipliers, percentage change and simple interest.
Each lesson listed below has its own page with downloadable resources and, where available, online tasks. Access depends on your membership level.
Yes if your timetable requires it — keep non-calculator methods before expressing one number as a percentage of another, teach percentage change with multipliers before simple interest, and ensure students can find a percentage of an amount before financial problems.
Additional revision lessons, exam-style questions and topic-based practice are available on the GCSE Maths Revision Hub. This is useful for consolidating learning after teaching the unit or for Year 11 exam preparation.
Students learn how to calculate a percentage of an amount using either 10% or working with equivalent fractions.
As learning progresses, students move on to calculate decimal percentages such as 33.33% or 12.5%.
Students learn about expressing one number as a percentage of another number using both calculator and non-calculator methods.
As learning progresses, they use percentages to compare different proportions from real-life problems.
This KS3 lesson pack introduces percentage increase and decrease as a single decimal multiplier, with slides, examples and a printable worksheet.
Learning progresses from finding a simple percentage increase to solving financial maths problems with interest and depreciation.
Students learn how to calculate a simple interest over a period of time.
Later, as learning progresses from calculating a simple interest to finding the principal amount, duration, and interest rate when the simple interest is known.
Additional practice calculating a percentage of an amount without a calculator.
The problem-solving activity challenges students to solve a real-life finance problem with percentages.
Use this pack after the main lesson for extra fluency and a problem-solving task on percentage change with multipliers.
The problem-solving activity challenges write the expression for the area of a composite shape.
Students are challenged to solve various real-life problems involving percentages.
There are six questions that involve the following skills
Students revise calculator methods for an amount after a percentage change, then tackle successive changes in an exam-style question.
As learning progresses they calculate successive percentage changes in an exam-style question.
Revision Hub
Browse the Mr Mathematics Revision Hub for more maths revision lessons organised by topic and GCSE grade.
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