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Subtract 90/63 from 80/45

1st number: 1 35/45, 2nd number: 1 27/63

80/45 - 90/63 is 22/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    80/45 = 80 × 7/45 × 7 = 560/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    90/63 = 90 × 5/63 × 5 = 450/315
  4. Subtract the two like fractions:
    560/315 - 450/315 = 560 - 450/315 = 110/315
  5. After reducing the fraction, the answer is 22/63

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