AQA GCSE Maths - Exchange Rates & Best Buys - Revision Notes

Sep 5, 2026

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Revision notes for AQA GCSE Maths covering two practical topics: exchange rates and best value buys. Explains how to simplify exchange rate conversion by putting rates into ratio form, adding lines for prices, using scale factors, and selecting the final answer with appropriate rounding. Then explains how to compare deals by calculating the cost of 1 item from each offer, using clear working, and choosing the cheaper per-item price to determine which shop provides better value for money.

LanguageEnglish

CategoryExam

FormatPDF

Pages4

Reading Time10 min

AccessFree to download

Exchange Rates & Best Buys

Exchange Rates

How do I simplify exchange rate questions?

Worked example

Best Buys

How do I workout which deal is best?

Head to www.savemyexams. com for more awesome resources AQA GCSE Maths Exchange Rates & Best Buys Contents Exchange Rates & Best Buys Page 1 of 4 © 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers Your notes Head to www.savemyexams. com for more awesome resources Exchange Rates & Best Buys Exchange Rates Exchange rates are used when comparing and converting between diyerent currencies. A good understanding of ratio and proportion is helpful for exchange rate conversion questions. How do I simplify exchange rate questions? Using ratios is one of the easiest ways to compare, convert and simplify exchange rates STEP 1 Put exchange rates in ratio form (use more than one line if necessary) STEP 2 Add lines for prices/costs STEP 3 Use scale factors to complete lines STEP 4 Pick out the answer Page 2 of 4 © 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers Your notes Head to www.savemyexams. com for more awesome resources Worked example €1 (1 Euro) is worth $19 .51 (Mexican Pesos) . ₿1 (1 Bitcoin) is worth €20004 .96 (Euro) . A vintage car costs $1000000 (Mexican Pesos) . What is the cost of the car in Bitcoin? Convert $1000000 Mexican Peso to Euros. Put the exchange rates in ratio form. Euro : Mexican Peso = 1 : 19.51 Add a line for each rate. Euro : Mexican Peso Convert $1000000 Mexican Peso to Euros by dividing 1000000 by 19 .51. 1000000 ÷ 19 .51 = 51255.7662 So $1000000 Mexican Peso = €51255 .7662... Euro. Convert €51255 .7662... Euro to Bitcoin. Put the exchange rates in ratio form. Bitcoin : Euro = 1 : 20004.96 Add a line for each rate. Bitcoin : Euro Convert €51255 .7662. .. Euro to Bitcoin by dividing 51255 .7662. .. by 20004 .96. 51255.7662... ÷ 20004 .96 = 2.56215... Bitcoin Round to a suitable degree of accuracy. ₿2 .56 Bitcoin Page 3 of 4 © 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers Your notes Head to www.savemyexams. com for more awesome resources Best Buys You need to be able to determine, with clear reasoning, which deal being oyered by shops is the best value for money. How do I workout which deal is best? Find the price of 1 item (by dividing the number of items and total price by the same scale factor) e. g. if 3 tins cost £1 .20 then 1 tin costs 40p (by dividing both quantities by 3) Compare the prices of 1 item from each shop / deal to see which is cheaper The cheaper deal is the better value for money e. g. 1 tin costs 40p from shop A and 45p from shop B 1 tin at shop A is cheaper than at shop B therefore shop A is the better value for money For more complicated deals, write down each line of working clearly Worked example Two deals for buying caps are given below: 3 caps for £22 .50 from Baseball World 5 caps for £36 from Head Hut At which shop are the caps better value? You must show your working. Find the cost of 1 cap from Baseball World (by dividing £22 .50 by 3) 22.50 ÷ 3 = £7 .50 for 1 cap from Baseball World Find the cost of 1 cap from Head Hut (by dividing 36 by 5) 36 ÷ 5 = £7 .20 for 1 cap from Head Hut Compare the price of 1 cap from each shop to see which is cheapest £7 .20 is cheaper than £7 .50 Write down, with reason, the shop with better value 1 cap from Head Hut costs £7.20 and 1 cap from Baseball World costs £7.50 £7.20 is cheaper than £7.50 so Head Hut is better value Your notes Page 4 of 4 © 2015 − 2025 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers

FAQs

How can I determine which shop has the best value for money?

Find the cost of 1 item for each deal by dividing the total price by the number of items (using the same scaling idea). Compare the per-item costs and choose the lower price, showing clear working.

Sep 5, 2026

Upload by Xiajie