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Estimate the sum or difference of 23/40 11/30
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Estimate the sum or difference of 23/40 11/30

User Rechie
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The least common multiple (and i apologize for my English) of 40 and 30 is 120.

23×3 69 11×4 44

-------= ------ -------= -------

40×3 120 30×4 120

69/120 - 44/120 = 25/120 witch is equal to 5/24 if you simplify with 5.

User Bertrand P
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