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Subtract 90/5 from 9/72

1st number: 9/72, 2nd number: 18 0/5

9/72 - 90/5 is -143/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 5 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    9/72 = 9 × 5/72 × 5 = 45/360
  3. Likewise, for the 2nd fraction, since 5 × 72 = 360,
    90/5 = 90 × 72/5 × 72 = 6480/360
  4. Subtract the two like fractions:
    45/360 - 6480/360 = 45 - 6480/360 = -6435/360
  5. After reducing the fraction, the answer is -143/8

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