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Subtract 30/20 from 7/18

1st number: 7/18, 2nd number: 1 10/20

7/18 - 30/20 is -10/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 18 × 10 = 180,
    7/18 = 7 × 10/18 × 10 = 70/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    30/20 = 30 × 9/20 × 9 = 270/180
  4. Subtract the two like fractions:
    70/180 - 270/180 = 70 - 270/180 = -200/180
  5. After reducing the fraction, the answer is -10/9

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