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Subtract 49/10 from 18/72

1st number: 18/72, 2nd number: 4 9/10

18/72 - 49/10 is -93/20.

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,
    18/72 = 18 × 5/72 × 5 = 90/360
  3. Likewise, for the 2nd fraction, since 10 × 36 = 360,
    49/10 = 49 × 36/10 × 36 = 1764/360
  4. Subtract the two like fractions:
    90/360 - 1764/360 = 90 - 1764/360 = -1674/360
  5. After reducing the fraction, the answer is -93/20

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