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Subtract 2/7 from 21/10

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

21/10 - 2/7 is 127/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 7 is 70
  2. For the 1st fraction, since 10 × 7 = 70,
    21/10 = 21 × 7/10 × 7 = 147/70
  3. Likewise, for the 2nd fraction, since 7 × 10 = 70,
    2/7 = 2 × 10/7 × 10 = 20/70
  4. Subtract the two fractions:
    147/70 - 20/70 = 147 - 20/70 = 127/70
  5. In mixed form: 157/70

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