Question 266885
5 1/2 - 2 7/10 
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Convert to improper fractions:
(2*5+1)/2 - (10*2+7)/10
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11/2 - 27/10
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Convert to a common denominator:
55/10 - 27/10
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Combine the "like" terms:
28/10
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Reduce the fraction:
= 14/5
Convert to a mixed number.
= 2 4/5
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Cheers,
Stan H.