Answer:
- Brian over Colin: £39.20
- Colin over Brian: -£39.20
Explanation:
The total of ratio units is 2+1+5 = 8. Brian gets 5 and Colin gets 1, so Brian gets (5-1) = 4 ratio units over Colin. Of the total tips, that is 4 of 8 ratio units or 4/8 = 1/2 of the tips:
Brian over Colin = (1/2)(£78.40) = £39.20
The amount Colin gets over Brian is the opposite of this: -£39.20.