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It is: 13/30
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2/5 = 6/15 + 4/15 = 10/15 = 2/3
1/5 = 3/15 2/3 = 10/15 3/15 + 10/15 = 13/15
2/3+1/5=10/15+3/15=(10+3)/15=13/15
-15/10 + 16/10 = 1/10
2/3 + 1/5 = 10/15 + 3/15 = 13/15