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Subtract 21/6 from 10/40

1st number: 10/40, 2nd number: 3 3/6

10/40 - 21/6 is -13/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 6 is 120
  2. For the 1st fraction, since 40 × 3 = 120,
    10/40 = 10 × 3/40 × 3 = 30/120
  3. Likewise, for the 2nd fraction, since 6 × 20 = 120,
    21/6 = 21 × 20/6 × 20 = 420/120
  4. Subtract the two fractions:
    30/120 - 420/120 = 30 - 420/120 = -390/120
  5. After reducing the fraction, the answer is -13/4

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