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)
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% ???