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Subtract 18/90 from 2/28

2/28 - 18/90 is -9/70.

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,
    2/28 = 2 × 45/28 × 45 = 90/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    18/90 = 18 × 14/90 × 14 = 252/1260
  4. Subtract the two like fractions:
    90/1260 - 252/1260 = 90 - 252/1260 = -162/1260
  5. After reducing the fraction, the answer is -9/70

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