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Subtract 10/24 from 5/21

5/21 - 10/24 is -5/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 24 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    5/21 = 5 × 8/21 × 8 = 40/168
  3. Likewise, for the 2nd fraction, since 24 × 7 = 168,
    10/24 = 10 × 7/24 × 7 = 70/168
  4. Subtract the two fractions:
    40/168 - 70/168 = 40 - 70/168 = -30/168
  5. After reducing the fraction, the answer is -5/28

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