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Subtract 15/27 from 21/7

1st number: 3 0/7, 2nd number: 15/27

21/7 - 15/27 is 22/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 27 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 7 × 27 = 189,
    21/7 = 21 × 27/7 × 27 = 567/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    15/27 = 15 × 7/27 × 7 = 105/189
  4. Subtract the two like fractions:
    567/189 - 105/189 = 567 - 105/189 = 462/189
  5. After reducing the fraction, the answer is 22/9
  6. In mixed form: 24/9

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