Foundation June 2023 Paper 1 Q20
20 The price of petrol decreases from £1.32 per litre to £1.02 per litre.
Calculate the percentage decrease in the price. [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 22.7[2…] or 22.73 or 23 or \(\dfrac{250}{11}\) | 3 | M2 for \(\left(1 - \dfrac{1.02}{1.32}\right)\) [\(\times\) 100] oe or \(\dfrac{1.32 - 1.02}{1.32}\) [\(\times\) 100] oe or \(\dfrac{1.02 - 1.32}{1.32}\) [\(\times\) 100] oe or M1 for \(\dfrac{1.02}{1.32}\) [\(\times\) 100] oe e.g. \(\dfrac{17}{22}\) | condone \(-22.7\)[2…] or \(-22.73\) or \(-23\) for 3 marks M2 implied by 0.227[2…] or 0.2273 or 0.23 or \(\dfrac{5}{22}\) M1 implied by 0.7727…, 0.77[3], 77.27, 77[.3] or 2270, 2272, 2273, 2300 Accept fully correct non-calculator methods |