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Subtract 20/70 from 40/21

1st number: 1 19/21, 2nd number: 20/70

40/21 - 20/70 is 34/21.

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,
    40/21 = 40 × 10/21 × 10 = 400/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    20/70 = 20 × 3/70 × 3 = 60/210
  4. Subtract the two like fractions:
    400/210 - 60/210 = 400 - 60/210 = 340/210
  5. After reducing the fraction, the answer is 34/21
  6. In mixed form: 113/21

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