Question

A 100 g packet of coffee costs £8.10

A 25 g packet of the same coffee costs £2.05
Which packet is better value for money?
Show how you decide.

Answer 1

100 g for £8.10

Explanation:

Find the unit cost of each deal and compare them.

100 g for £8.10

unit cost = £8.10 / 100 g = 0.081 £/g

25 g for £2.05

unit cost = £2.05 / 25 g = 0.082 £/g

Since 0.082 £/g > 0.081 £/g, 100 g for £8.10 is a better deal.