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Add 21/36 and 81/7

1st number: 21/36, 2nd number: 11 4/7

21/36 + 81/7 is 1021/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 7 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 36 × 7 = 252,
    21/36 = 21 × 7/36 × 7 = 147/252
  3. Likewise, for the 2nd fraction, since 7 × 36 = 252,
    81/7 = 81 × 36/7 × 36 = 2916/252
  4. Add the two like fractions:
    147/252 + 2916/252 = 147 + 2916/252 = 3063/252
  5. 3063/252 simplified gives 1021/84
  6. So, 21/36 + 81/7 = 1021/84
    In mixed form: 1213/84

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