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Subtract 21/7 from 1/4

1st number: 1/4, 2nd number: 3 0/7

1/4 - 21/7 is -11/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    1/4 = 1 × 7/4 × 7 = 7/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    21/7 = 21 × 4/7 × 4 = 84/28
  4. Subtract the two fractions:
    7/28 - 84/28 = 7 - 84/28 = -77/28
  5. After reducing the fraction, the answer is -11/4

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