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Subtract 81/72 from 8/10

1st number: 8/10, 2nd number: 1 9/72

8/10 - 81/72 is -13/40.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 10 × 36 = 360,
    8/10 = 8 × 36/10 × 36 = 288/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    81/72 = 81 × 5/72 × 5 = 405/360
  4. Subtract the two like fractions:
    288/360 - 405/360 = 288 - 405/360 = -117/360
  5. After reducing the fraction, the answer is -13/40

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