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Add 60/15 and 20/21

1st number: 4 0/15, 2nd number: 20/21

60/15 + 20/21 is 104/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    60/15 = 60 × 7/15 × 7 = 420/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    20/21 = 20 × 5/21 × 5 = 100/105
  4. Add the two like fractions:
    420/105 + 100/105 = 420 + 100/105 = 520/105
  5. 520/105 simplified gives 104/21
  6. So, 60/15 + 20/21 = 104/21
    In mixed form: 420/21

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