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AlgebraicAardvark

1:4:3 means Ann gets 1 portion, Bob gets 4 portions, and Carl get 3 portions.  In total, there are 8 portions.

    £480/8 = £60

So one portion is £60.

You can now figure that:

    Ann gets 1 x £60  = ______

    Bob gets 4 x £60 = ______

    Carl gets 3 x £60 = ______