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Add 30/21 and 21/20

1st number: 1 9/21, 2nd number: 1 1/20

30/21 + 21/20 is 347/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420
  2. For the 1st fraction, since 21 × 20 = 420,
    30/21 = 30 × 20/21 × 20 = 600/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    21/20 = 21 × 21/20 × 21 = 441/420
  4. Add the two fractions:
    600/420 + 441/420 = 600 + 441/420 = 1041/420
  5. 1041/420 simplified gives 347/140
  6. So, 30/21 + 21/20 = 347/140
    In mixed form: 267/140

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