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Subtract 90/10 from 4/72

1st number: 4/72, 2nd number: 9 0/10

4/72 - 90/10 is -161/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 10 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    4/72 = 4 × 5/72 × 5 = 20/360
  3. Likewise, for the 2nd fraction, since 10 × 36 = 360,
    90/10 = 90 × 36/10 × 36 = 3240/360
  4. Subtract the two like fractions:
    20/360 - 3240/360 = 20 - 3240/360 = -3220/360
  5. After reducing the fraction, the answer is -161/18

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