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Add 21/10 and 28/60

1st number: 2 1/10, 2nd number: 28/60

21/10 + 28/60 is 77/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 60 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 10 × 6 = 60,
    21/10 = 21 × 6/10 × 6 = 126/60
  3. Likewise, for the 2nd fraction, since 60 × 1 = 60,
    28/60 = 28 × 1/60 × 1 = 28/60
  4. Add the two like fractions:
    126/60 + 28/60 = 126 + 28/60 = 154/60
  5. 154/60 simplified gives 77/30
  6. So, 21/10 + 28/60 = 77/30
    In mixed form: 217/30

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