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Subtract 4/90 from 9/28

9/28 - 4/90 is 349/1260.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    9/28 = 9 × 45/28 × 45 = 405/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    4/90 = 4 × 14/90 × 14 = 56/1260
  4. Subtract the two like fractions:
    405/1260 - 56/1260 = 405 - 56/1260 = 349/1260

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