## Wednesday, January 19, 2011

### Eleven Plus Percentages

Your child has a bike which is now rather small. You bought it at great expense some time ago. The bike has stayed the same size – it is your child who has grown. You want some money for the bike – and don’t want to give it away. You do not want much money for the bike – after all it has been used.

A friend offers you £35.50. You work out that this would give you a return of 17% if you did not trade the bike in.

Your child’s older sister, who is at grammar school and it at all times a bit of a `know all’, maintains that you need to make a profit of 26% on a private sale when you take into account what the shop is offering in incentives.

You mumble rather inconclusively as you just want to get rid of the bike. At the moment the bike is just one more bit of clutter. Your brain then lights up. Your eleven plus child should solve the problem and then receive the bike as a reward for going above and beyond the so called eleven plus syllabus.

You and your child have studied percentages.

117% of the bike is the cost price.

126% must be £35.10 multiplied by 117 and divided by 126.