1. Objectives
To understand how to use proportion to find which item is better value.
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.

2. Start by considering how many grams you get per penny.
1. Which is better value?
Allnut
30g of chocolate
44p
Bananabite
100g of chocolate
£1.40
Chocoholic
400g of chocolate
£5.80
Start by considering how many grams you get per penny.
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.

3. 1. Which is better value? Allnut 30g of chocolate 44p Bananabite
£1.40
Chocoholic
400g of chocolate
£5.80
per penny
per penny
per penny
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.

4. 1. Which is better value? Allnut 30g of chocolate 44p Bananabite
£1.40
Chocoholic
400g of chocolate
£5.80
per penny
per penny
per penny
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.

5. Bananabite is the best value chocolate.
1. Which is better value?
Bananabite
100g of chocolate
£1.40
per penny
Bananabite is the best value chocolate.
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.

6. Summary
To compare values you must break each down to a common unit. Here we used the number of grams per penny. You could have used the cost per gram.
Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original.