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Subtract 5/7 from 21/5

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

21/5 - 5/7 is 122/35.

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,
    5/7 = 5 × 5/7 × 5 = 25/35
  4. Subtract the two fractions:
    147/35 - 25/35 = 147 - 25/35 = 122/35
  5. In mixed form: 317/35

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