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Add 21/28 and 30/49

21/28 + 30/49 is 267/196.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 49 is 196
  2. For the 1st fraction, since 28 × 7 = 196,
    21/28 = 21 × 7/28 × 7 = 147/196
  3. Likewise, for the 2nd fraction, since 49 × 4 = 196,
    30/49 = 30 × 4/49 × 4 = 120/196
  4. Add the two fractions:
    147/196 + 120/196 = 147 + 120/196 = 267/196
  5. So, 21/28 + 30/49 = 267/196
    In mixed form: 171/196

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