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Add 21/28 and 28/32

21/28 + 28/32 is 13/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 32 is 224

    Next, find the equivalent fraction of both fractional numbers with denominator 224
  2. For the 1st fraction, since 28 × 8 = 224,
    21/28 = 21 × 8/28 × 8 = 168/224
  3. Likewise, for the 2nd fraction, since 32 × 7 = 224,
    28/32 = 28 × 7/32 × 7 = 196/224
  4. Add the two like fractions:
    168/224 + 196/224 = 168 + 196/224 = 364/224
  5. 364/224 simplified gives 13/8
  6. So, 21/28 + 28/32 = 13/8
    In mixed form: 15/8

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