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Subtract 42/20 from 30/70

1st number: 30/70, 2nd number: 2 2/20

30/70 - 42/20 is -117/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 70 × 2 = 140,
    30/70 = 30 × 2/70 × 2 = 60/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    42/20 = 42 × 7/20 × 7 = 294/140
  4. Subtract the two like fractions:
    60/140 - 294/140 = 60 - 294/140 = -234/140
  5. After reducing the fraction, the answer is -117/70

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