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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