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Subtract 49/21 from 7/90

1st number: 7/90, 2nd number: 2 7/21

7/90 - 49/21 is -203/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 21 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    7/90 = 7 × 7/90 × 7 = 49/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    49/21 = 49 × 30/21 × 30 = 1470/630
  4. Subtract the two like fractions:
    49/630 - 1470/630 = 49 - 1470/630 = -1421/630
  5. After reducing the fraction, the answer is -203/90

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