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Subtract 24/28 from 7/90

7/90 - 24/28 is -491/630.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 28 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 90 × 14 = 1260,
    7/90 = 7 × 14/90 × 14 = 98/1260
  3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
    24/28 = 24 × 45/28 × 45 = 1080/1260
  4. Subtract the two like fractions:
    98/1260 - 1080/1260 = 98 - 1080/1260 = -982/1260
  5. After reducing the fraction, the answer is -491/630

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