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Subtract 80/70 from 60/21

1st number: 2 18/21, 2nd number: 1 10/70

60/21 - 80/70 is 12/7.

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,
    60/21 = 60 × 10/21 × 10 = 600/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    80/70 = 80 × 3/70 × 3 = 240/210
  4. Subtract the two like fractions:
    600/210 - 240/210 = 600 - 240/210 = 360/210
  5. After reducing the fraction, the answer is 12/7
  6. In mixed form: 15/7

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