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Subtract 4/72 from 1/30

1/30 - 4/72 is -1/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 72 is 360
  2. For the 1st fraction, since 30 × 12 = 360,
    1/30 = 1 × 12/30 × 12 = 12/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    4/72 = 4 × 5/72 × 5 = 20/360
  4. Subtract the two fractions:
    12/360 - 20/360 = 12 - 20/360 = -8/360
  5. After reducing the fraction, the answer is -1/45

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