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Subtract 1/72 from 30/42

30/42 - 1/72 is 353/504.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 72 is 504
  2. For the 1st fraction, since 42 × 12 = 504,
    30/42 = 30 × 12/42 × 12 = 360/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    1/72 = 1 × 7/72 × 7 = 7/504
  4. Subtract the two fractions:
    360/504 - 7/504 = 360 - 7/504 = 353/504

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