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Subtract 35/45 from 42/21

1st number: 2 0/21, 2nd number: 35/45

42/21 - 35/45 is 11/9.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315
  2. For the 1st fraction, since 21 × 15 = 315,
    42/21 = 42 × 15/21 × 15 = 630/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    35/45 = 35 × 7/45 × 7 = 245/315
  4. Subtract the two fractions:
    630/315 - 245/315 = 630 - 245/315 = 385/315
  5. After reducing the fraction, the answer is 11/9
  6. In mixed form: 12/9

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