Percentage Change | KS3 Increase, Decrease and Multipliers

UK KS3

Explain increases and decreases using the original value. Connect percentage methods to multipliers and explore why equal percentage increases and decreases do not cancel. Includes homework and worked answers.

WHAT IS INCLUDED

• 16 pages in colour and monochrome, each in A4 and US Letter (four PDFs with matching teaching content).
• 12 editable PowerPoint teaching slides with teacher notes and editable diagrams.
• Readiness check, worked models, classroom practice and reasoning.
• Separate homework, an exit check and a reference summary.
• Worked answers, teaching guidance and editable question text.

SCOPE AND USE
Pupils should convert between fractions, decimals and percentages and calculate a percentage of an amount. Basic calculator use is appropriate after pupils identify the original amount. The final readiness question is diagnostic: the percentage-change method is taught in Lesson 2, so an explanation distinguishing units from percent is enough initially. Reverse percentage and successive changes are marked as extensions.
Designed for two adaptable lessons; timing depends on pupils’ prior understanding. Diagrams are illustrative, not to scale. No ruler-measuring template or external website is needed. Download the ZIP and extract it before opening the files. A PDF reader and PowerPoint-compatible software are needed; slide appearance may vary in other applications.

LICENCE AND SUPPORT
For one purchasing teacher and the pupils they teach, including secure classroom sharing. Classroom adaptation is allowed; public redistribution and resale are not. Questions or corrections: support@openlatitude.net. Please omit pupil-identifying details. See the preview for actual pupil pages and an answer extract.