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Subtract 2/7 from 21/5

1st number: 4 1/5, 2nd number: 2/7

21/5 - 2/7 is 137/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 7 is 35
  2. For the 1st fraction, since 5 × 7 = 35,
    21/5 = 21 × 7/5 × 7 = 147/35
  3. Likewise, for the 2nd fraction, since 7 × 5 = 35,
    2/7 = 2 × 5/7 × 5 = 10/35
  4. Subtract the two fractions:
    147/35 - 10/35 = 147 - 10/35 = 137/35
  5. In mixed form: 332/35

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