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Add 21/28 and 28/18

1st number: 21/28, 2nd number: 1 10/18

21/28 + 28/18 is 83/36.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 18 is 252
  2. For the 1st fraction, since 28 × 9 = 252,
    21/28 = 21 × 9/28 × 9 = 189/252
  3. Likewise, for the 2nd fraction, since 18 × 14 = 252,
    28/18 = 28 × 14/18 × 14 = 392/252
  4. Add the two fractions:
    189/252 + 392/252 = 189 + 392/252 = 581/252
  5. 581/252 simplified gives 83/36
  6. So, 21/28 + 28/18 = 83/36
    In mixed form: 211/36

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