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Subtract 7/90 from 15/42

15/42 - 7/90 is 88/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 42 × 15 = 630,
    15/42 = 15 × 15/42 × 15 = 225/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    7/90 = 7 × 7/90 × 7 = 49/630
  4. Subtract the two like fractions:
    225/630 - 49/630 = 225 - 49/630 = 176/630
  5. After reducing the fraction, the answer is 88/315

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