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Subtract 18/10 from 21/14

1st number: 1 7/14, 2nd number: 1 8/10

21/14 - 18/10 is -3/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 14 and 10 is 70

    Next, find the equivalent fraction of both fractional numbers with denominator 70
  2. For the 1st fraction, since 14 × 5 = 70,
    21/14 = 21 × 5/14 × 5 = 105/70
  3. Likewise, for the 2nd fraction, since 10 × 7 = 70,
    18/10 = 18 × 7/10 × 7 = 126/70
  4. Subtract the two like fractions:
    105/70 - 126/70 = 105 - 126/70 = -21/70
  5. After reducing the fraction, the answer is -3/10

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