The first thing we need to realise that the cost of the trip is going to be split between 5 people (Jill + 4 friends). As they are all sharing the cost of the trip equally, we need to find the total cost of the trip. This answer can be found through a variety of methods (£120 + £58 + £100 + £207) = £485Then we need to work out £485/ 5 = £97 (A variety of methods can be used to teach this, for example the bus stop method). Therefore, Jill must pay £97 towards the trip.