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Subtract 9/40 from 90/72

1st number: 1 18/72, 2nd number: 9/40

90/72 - 9/40 is 41/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    90/72 = 90 × 5/72 × 5 = 450/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    9/40 = 9 × 9/40 × 9 = 81/360
  4. Subtract the two like fractions:
    450/360 - 81/360 = 450 - 81/360 = 369/360
  5. After reducing the fraction, the answer is 41/40
  6. In mixed form: 11/40

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