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Subtract 21/14 from 7/5

1st number: 1 2/5, 2nd number: 1 7/14

7/5 - 21/14 is -1/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 14 is 70
  2. For the 1st fraction, since 5 × 14 = 70,
    7/5 = 7 × 14/5 × 14 = 98/70
  3. Likewise, for the 2nd fraction, since 14 × 5 = 70,
    21/14 = 21 × 5/14 × 5 = 105/70
  4. Subtract the two fractions:
    98/70 - 105/70 = 98 - 105/70 = -7/70
  5. After reducing the fraction, the answer is -1/10

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