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Subtract 7/30 from 42/72

42/72 - 7/30 is 7/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 30 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    42/72 = 42 × 5/72 × 5 = 210/360
  3. Likewise, for the 2nd fraction, since 30 × 12 = 360,
    7/30 = 7 × 12/30 × 12 = 84/360
  4. Subtract the two like fractions:
    210/360 - 84/360 = 210 - 84/360 = 126/360
  5. After reducing the fraction, the answer is 7/20

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