Fractions, Decimals & Percentages
Making Cupcakes with Maths: Fractions, Decimals & Percentages (Year 8)
Bring real-world maths into your classroom with this engaging, hands-on investigation that places students in charge of designing, costing, and running a cupcake business. This comprehensive Year 8 Mathematics task uses a familiar and motivating context to develop deep understanding of fractions, decimals, ratios, percentages, and financial mathematics through authentic problem-solving.
Across a series of connected investigations, students scale recipes, convert between number forms, compare supermarket prices, calculate profit and loss, reason with ratios, and apply percentages to realistic business scenarios. The task gradually builds in complexity, encouraging students to justify decisions, communicate reasoning, and apply mathematical modelling in meaningful contexts.
This resource is ideal as a rich assessment task, extended investigation, or project-based learning activity, and can be used over multiple lessons or as a summative task.
Key Features
Real-world, engaging cupcake business context
Strong focus on fractions, decimals, ratios, percentages, and financial maths
Explicit opportunities for reasoning, justification, and problem-solving
Includes cost comparisons, profit calculations, scaling, and unit conversions
Encourages students to show working and communicate mathematically
Clear A–E marking rubric aligned with achievement standards
Print-ready student workbook format (Word document)
Curriculum Alignment
Aligned to Year 8 Mathematics, including:
Operations with integers and rational numbers
Fractions, decimals, ratios, and percentages
Mathematical modelling in financial and measurement contexts
Interpretation, reasoning, and communication of mathematical results
What’s Included
Full student investigation booklet
Structured, multi-part task with increasing challenge
Realistic data tables and applied scenarios
Assessment rubric (A–E) for consistent marking
This task works especially well for teachers looking to move beyond worksheets and into authentic, applied mathematics that students can relate to and enjoy.
