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Subtract 7/8 from 21/10

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

21/10 - 7/8 is 49/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 8 is 40
  2. For the 1st fraction, since 10 × 4 = 40,
    21/10 = 21 × 4/10 × 4 = 84/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    7/8 = 7 × 5/8 × 5 = 35/40
  4. Subtract the two fractions:
    84/40 - 35/40 = 84 - 35/40 = 49/40
  5. In mixed form: 19/40

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