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Subtract 21/63 from 45/80

45/80 - 21/63 is 11/48.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 63 is 5040
  2. For the 1st fraction, since 80 × 63 = 5040,
    45/80 = 45 × 63/80 × 63 = 2835/5040
  3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
    21/63 = 21 × 80/63 × 80 = 1680/5040
  4. Subtract the two fractions:
    2835/5040 - 1680/5040 = 2835 - 1680/5040 = 1155/5040
  5. After reducing the fraction, the answer is 11/48

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