Maths and percentages

[spainlads]

If I have an end sum, say �150,000. 11% has been added to a figure to get to that sum of �150,000 then what was the original figure, and how do you get to that??
My heads hurting :confused:

[THECORBYLOON]

It may be easier to see the working if easier figures are used first.

An amount is increased by 25% and the new figure is 100, what was the original amount?

The new figure is 125% or 125/100 (which simplifies to 5/4) of the original. To find the old amount, reverse the fraction and mulitiply that by the new amount so

4/5 X 100 = old amount = 80

In yir example spainlads, the new amount is 111% of the original or 111/100. The original amount was

100/111 X �150,000 = �135,135.13

[CheekyChops]

Well �150,000 is obviously 111% so divide �150,000 by 111 to get 1%. Times that figure by 100 an you will get the original sum.

That is �135135.14.

[CheekyChops]

ooops, I mean the original amount, not the original sum.