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Subtract 9/10 from 3/72

3/72 - 9/10 is -103/120.

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,
    3/72 = 3 × 5/72 × 5 = 15/360
  3. Likewise, for the 2nd fraction, since 10 × 36 = 360,
    9/10 = 9 × 36/10 × 36 = 324/360
  4. Subtract the two like fractions:
    15/360 - 324/360 = 15 - 324/360 = -309/360
  5. After reducing the fraction, the answer is -103/120

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