Posted by **cindy** on Sunday, February 17, 2008 at 1:15am.

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.

- maths -
**drwls**, Sunday, February 17, 2008 at 5:59am
4/5 - 1/2 = 8/10 - 5/10

= 3/10 = fraction added by rain

- maths -
**alexis**, Sunday, February 17, 2008 at 11:23am
help math

- maths -
**Guido**, Sunday, February 17, 2008 at 10:59am
The word half = 1/2.

Four fifths = 4/5.

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

Now:

1/2 = 50

4/5 = 80

80 - 50 = 30

30 = 3/10

Done!

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