well, since the ratio is 8:5:2 you need 8 bits, then 5 bits then 2 bits. So 8+5+2=15, 9.00÷15=0.60, so 0.60=1 bit.
So for Amanda 0.60×8=4.80; for Anita 0.60×5=3.00 and for Claire 0.60×2=1.20
Amanda gets £4.80; Anita gets £3.00 and Claire gets £1.20.
To check your answer you add the money that was given to each individual together and if it equals the initial £9.00, then your answer is correct, you can also check this by seeing who has the most money, the person with the highest number should have the highest amount of money.