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Anonymous
It is 1 1/30.
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3/10 = 9/30 and 2/15 = 4/309/30 + 4/30 = 13/3013/30
9/10 minus 9/15 is 3/10
7/10 minus 9/15 is 1/10
(9/10)-(2/15)=x (27/30)-(4/30)=x x=(23/30)
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