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Subtract 30/20 from 1/7

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

1/7 - 30/20 is -19/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    1/7 = 1 × 20/7 × 20 = 20/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    30/20 = 30 × 7/20 × 7 = 210/140
  4. Subtract the two like fractions:
    20/140 - 210/140 = 20 - 210/140 = -190/140
  5. After reducing the fraction, the answer is -19/14

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