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Subtract 21/45 from 90/75

1st number: 1 15/75, 2nd number: 21/45

90/75 - 21/45 is 11/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 45 is 225

    Next, find the equivalent fraction of both fractional numbers with denominator 225
  2. For the 1st fraction, since 75 × 3 = 225,
    90/75 = 90 × 3/75 × 3 = 270/225
  3. Likewise, for the 2nd fraction, since 45 × 5 = 225,
    21/45 = 21 × 5/45 × 5 = 105/225
  4. Subtract the two like fractions:
    270/225 - 105/225 = 270 - 105/225 = 165/225
  5. After reducing the fraction, the answer is 11/15

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