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Subtract 90/28 from 42/70

1st number: 42/70, 2nd number: 3 6/28

42/70 - 90/28 is -183/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 28 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 70 × 2 = 140,
    42/70 = 42 × 2/70 × 2 = 84/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    90/28 = 90 × 5/28 × 5 = 450/140
  4. Subtract the two like fractions:
    84/140 - 450/140 = 84 - 450/140 = -366/140
  5. After reducing the fraction, the answer is -183/70

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