First we convert them into similar units, giving us 10 fifteenths and 12 fifteenths. Together that is 22 fifteenths or 1 and 7 fifteenths.
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Thirteen fifths
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Four fifths times one and two thirds times one and one eighth = 1 1/2 or 1.5
four fifths
Four sixths is bigger. Since if you simplify four sixths is equivalent to two thirds. So two thirds is bigger than two fifths, just like one half is bigger than two thirds.