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Add 21/45 and 27/20

1st number: 21/45, 2nd number: 1 7/20

21/45 + 27/20 is 109/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 45 × 4 = 180,
    21/45 = 21 × 4/45 × 4 = 84/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    27/20 = 27 × 9/20 × 9 = 243/180
  4. Add the two like fractions:
    84/180 + 243/180 = 84 + 243/180 = 327/180
  5. 327/180 simplified gives 109/60
  6. So, 21/45 + 27/20 = 109/60
    In mixed form: 149/60

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