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2/5 - 1/10 = (2×2)/(5×2) - 1/10 = 4/10 - 1/10 = (4-1)/10 = 3/10.
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2/5 - 1/10 = 4/10 - 1/10 = 3/10
1 and 4 fifths.
It is: 1/2 minus 2/5 = 1/10
It is: 2 and 1/3 minus 2/5 = 1 and 14/15
-2 and 1/5