Monday 29 June 2009

Reverse percentages

An example:
Try to do the question first:
In a sale, normal prices are reduced by 12%
The sale price of a a computer is £726.
Work out the normal price of the computer




Another worked example
A hat costs £99.60 after a 17% priced reduction.
How much was it before the reduction?


Percentage increase/decrease

Interest: simple and compound