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Subtract 1/15 from 70/21

1st number: 3 7/21, 2nd number: 1/15

70/21 - 1/15 is 49/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    70/21 = 70 × 5/21 × 5 = 350/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    1/15 = 1 × 7/15 × 7 = 7/105
  4. Subtract the two like fractions:
    350/105 - 7/105 = 350 - 7/105 = 343/105
  5. After reducing the fraction, the answer is 49/15
  6. In mixed form: 34/15

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