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Subtract 18/20 from 70/9

1st number: 7 7/9, 2nd number: 18/20

70/9 - 18/20 is 619/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 9 × 20 = 180,
    70/9 = 70 × 20/9 × 20 = 1400/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    18/20 = 18 × 9/20 × 9 = 162/180
  4. Subtract the two like fractions:
    1400/180 - 162/180 = 1400 - 162/180 = 1238/180
  5. After reducing the fraction, the answer is 619/90
  6. In mixed form: 679/90

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