evaluate - 2 by 3 minus 4 by 5 (chapter name - rational numbers)
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please see the above attachment
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2/3 - 4/5
LCM for 3 and 5 = 15
2/3×5/5 = 10/15
4/5×3/3 = 12/15
10/15-12/15 = -2/15
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