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Subtract 90/28 from 1/45

1st number: 1/45, 2nd number: 3 6/28

1/45 - 90/28 is -2011/630.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 28 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 45 × 28 = 1260,
    1/45 = 1 × 28/45 × 28 = 28/1260
  3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
    90/28 = 90 × 45/28 × 45 = 4050/1260
  4. Subtract the two like fractions:
    28/1260 - 4050/1260 = 28 - 4050/1260 = -4022/1260
  5. After reducing the fraction, the answer is -2011/630

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