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Subtract 3/8 from 21/28

21/28 - 3/8 is 3/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 8 is 56
  2. For the 1st fraction, since 28 × 2 = 56,
    21/28 = 21 × 2/28 × 2 = 42/56
  3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
    3/8 = 3 × 7/8 × 7 = 21/56
  4. Subtract the two fractions:
    42/56 - 21/56 = 42 - 21/56 = 21/56
  5. After reducing the fraction, the answer is 3/8

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