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Add 21/18 and 48/21

1st number: 1 3/18, 2nd number: 2 6/21

21/18 + 48/21 is 145/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 21 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    21/18 = 21 × 7/18 × 7 = 147/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    48/21 = 48 × 6/21 × 6 = 288/126
  4. Add the two like fractions:
    147/126 + 288/126 = 147 + 288/126 = 435/126
  5. 435/126 simplified gives 145/42
  6. So, 21/18 + 48/21 = 145/42
    In mixed form: 319/42

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