Hi,

I am looking for an easy formula to calculate the following ;

There are several different fees for room bookings depending on time of year and room type.

Tourist information take 10% of any fee from a successfull booking

So, say the normal price for a room is £30 then I need to increase the room booking fee by the same amount that would give me £30 once the tourist information have taken their 10% fee.

This seemed easy at first but then seemed to get harder once I tried to come up with a general formula

30 + 10%

30 + (0.1 * 30)

30 + (3)

33

However if I charge 33 and tourist info take 10% thats

33 - (33 x 0.1) = 33 - 3.3 = 29.70

Somehow I lose 30p ?

I have to factor in the 10% of the 10% ???

Anyhelp appreciated!