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Subtract 21/27 from 42/4

1st number: 10 2/4, 2nd number: 21/27

42/4 - 21/27 is 175/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 27 is 108
  2. For the 1st fraction, since 4 × 27 = 108,
    42/4 = 42 × 27/4 × 27 = 1134/108
  3. Likewise, for the 2nd fraction, since 27 × 4 = 108,
    21/27 = 21 × 4/27 × 4 = 84/108
  4. Subtract the two fractions:
    1134/108 - 84/108 = 1134 - 84/108 = 1050/108
  5. After reducing the fraction, the answer is 175/18
  6. In mixed form: 913/18

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