More guides on this topic

• Budgeting
• Best deal
• Converting between currencies
• Saving and Borrowing
• Costs and logistics of a dodgem car ride

Related links

• BBC Podcasts: Maths
• BBC Radio 4: Maths collection
• BBC Skillswise
• SQA Lifeskills Maths
• GOV.UK
• Maths is Fun
• NRICH Maths Club