3 fifteenths minus 5 fifteenths equals minus 2 fifteenths.
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3/5 minus 2/15 is 7/15.
7
Find the "common denominator". 2/5 is 6/15. So 1 fifteenth minus 6 fifteenths is minus 5 fifteenths , or minus one third
3/15 = 1/5 So the question becomes 3/5 - 1/5 which is 2/5.
It is: 4/5 minus 4/15 = 8/15