Answer:
45 %
Step-by-step explanation:
Don't know if it's right, but do let me know! use percentage to visualise your workings. :)
I think the answer is 32x
The cost of the tour= £

.
The deposit is just an initial pay, which is a part payment of the total cost
If you pay a deposit of £78 out of £359, Then you need to subtract £78 from £359 to obtain,

pounds.
Therefore you need to pay £281 more.