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12/3 - 21/2 = 1x3+2/3 - 2x2+1/2 (convert to improper fractions)

= 5/3 - 5/2

= 5x2/3x2 - 5x3/2x3 (convert to equivalent fractions with same denominator)

= 10/6 - 15/6

= 10-15/6

= -5/6

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12y ago

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