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Subtract 5/42 from 20/8

1st number: 2 4/8, 2nd number: 5/42

20/8 - 5/42 is 50/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 42 is 168
  2. For the 1st fraction, since 8 × 21 = 168,
    20/8 = 20 × 21/8 × 21 = 420/168
  3. Likewise, for the 2nd fraction, since 42 × 4 = 168,
    5/42 = 5 × 4/42 × 4 = 20/168
  4. Subtract the two fractions:
    420/168 - 20/168 = 420 - 20/168 = 400/168
  5. After reducing the fraction, the answer is 50/21
  6. In mixed form: 28/21

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