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Subtract 90/72 from 84/75

1st number: 1 9/75, 2nd number: 1 18/72

84/75 - 90/72 is -13/100.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 72 is 1800

    Next, find the equivalent fraction of both fractional numbers with denominator 1800
  2. For the 1st fraction, since 75 × 24 = 1800,
    84/75 = 84 × 24/75 × 24 = 2016/1800
  3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
    90/72 = 90 × 25/72 × 25 = 2250/1800
  4. Subtract the two like fractions:
    2016/1800 - 2250/1800 = 2016 - 2250/1800 = -234/1800
  5. After reducing the fraction, the answer is -13/100

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