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Subtract 49/70 from 6/21

6/21 - 49/70 is -29/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 70 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    6/21 = 6 × 10/21 × 10 = 60/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    49/70 = 49 × 3/70 × 3 = 147/210
  4. Subtract the two like fractions:
    60/210 - 147/210 = 60 - 147/210 = -87/210
  5. After reducing the fraction, the answer is -29/70

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