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Subtract 8/42 from 30/45

30/45 - 8/42 is 10/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 42 is 630
  2. For the 1st fraction, since 45 × 14 = 630,
    30/45 = 30 × 14/45 × 14 = 420/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    8/42 = 8 × 15/42 × 15 = 120/630
  4. Subtract the two fractions:
    420/630 - 120/630 = 420 - 120/630 = 300/630
  5. After reducing the fraction, the answer is 10/21

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