Intermediate November 2019 Unit 2 Q13
13. Sian thinks of a number.
Its value is increased by 25%.
Express the original number as a percentage of the increased number. [3]
| Scheme | Marks | Comments |
|---|---|---|
| Sight of 1·25 or 125(%) | B1 | Accept sight of n and 1·25n where n may be any numerical value e.g. ‘18 and 22·5’. |
| \(\dfrac{n}{1{\cdot}25n}\) (×100) | M1 | \(\dfrac{1}{1{\cdot}25}\) (n =1) OR 0·8 implies B1M1. |
| = 80(%) | A1 | An answer of 80(%) gains B1M1A1. |