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Subtract 21/40 from 63/7

1st number: 9 0/7, 2nd number: 21/40

63/7 - 21/40 is 339/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    63/7 = 63 × 40/7 × 40 = 2520/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    21/40 = 21 × 7/40 × 7 = 147/280
  4. Subtract the two like fractions:
    2520/280 - 147/280 = 2520 - 147/280 = 2373/280
  5. After reducing the fraction, the answer is 339/40
  6. In mixed form: 819/40

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