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Subtract 1/40 from 21/6

1st number: 3 3/6, 2nd number: 1/40

21/6 - 1/40 is 139/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 40 is 120
  2. For the 1st fraction, since 6 × 20 = 120,
    21/6 = 21 × 20/6 × 20 = 420/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    1/40 = 1 × 3/40 × 3 = 3/120
  4. Subtract the two fractions:
    420/120 - 3/120 = 420 - 3/120 = 417/120
  5. After reducing the fraction, the answer is 139/40
  6. In mixed form: 319/40

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