A rain water tank is half full. After it rained the tank if four fifths full.

- Find the amount of water collected as a fraction of a full tank.

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  1. 4/5 - 1/2 = 8/10 - 5/10
    = 3/10 = fraction added by rain

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  2. The word half = 1/2.

    Four fifths = 4/5.

    To find the answer, we subtract 1/2 from 4/5.


    1/2 = 50

    4/5 = 80

    80 - 50 = 30

    30 = 3/10


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  3. help math

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