Which is better value: 250g of butter for £2.40 or 400g for £3.60?
Step 1 Calculate price per gram for first option
250g for £2.40
Price per gram = £2.40 ÷ 250 = £0.0096 per gram
Or 0.96p per gram
Step 2 Calculate price per gram for second option
400g for £3.60
Price per gram = £3.60 ÷ 400 = £0.009 per gram
Or 0.9p per gram
Final Compare and decide
0.9p per gram < 0.96p per gram
400g for £3.60 is better value
This study notes covers Worked Example 1: Basic Price Per Unit within Best Buy for GCSE Mathematics. Revise Best Buy in Ratio & Proportion for GCSE Mathematics with 12 exam-style questions and 22 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 4 of 8 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Best Buy
Which method correctly compares the value of two products?
Three sizes of shampoo are available: - Travel: 100 ml for 95p - Regular: 300 ml for £2.55 - Family: 500 ml for £4.00 Find the best value size. Show all working.