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Subtract 15/40 from 45/7

1st number: 6 3/7, 2nd number: 15/40

45/7 - 15/40 is 339/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280
  2. For the 1st fraction, since 7 × 40 = 280,
    45/7 = 45 × 40/7 × 40 = 1800/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    15/40 = 15 × 7/40 × 7 = 105/280
  4. Subtract the two fractions:
    1800/280 - 105/280 = 1800 - 105/280 = 1695/280
  5. After reducing the fraction, the answer is 339/56
  6. In mixed form: 63/56

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