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Subtract 4/90 from 3/7

3/7 - 4/90 is 121/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 7 × 90 = 630,
    3/7 = 3 × 90/7 × 90 = 270/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    4/90 = 4 × 7/90 × 7 = 28/630
  4. Subtract the two like fractions:
    270/630 - 28/630 = 270 - 28/630 = 242/630
  5. After reducing the fraction, the answer is 121/315

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