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Add 15/21 and 48/60

15/21 + 48/60 is 53/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 60 is 420
  2. For the 1st fraction, since 21 × 20 = 420,
    15/21 = 15 × 20/21 × 20 = 300/420
  3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
    48/60 = 48 × 7/60 × 7 = 336/420
  4. Add the two fractions:
    300/420 + 336/420 = 300 + 336/420 = 636/420
  5. 636/420 simplified gives 53/35
  6. So, 15/21 + 48/60 = 53/35
    In mixed form: 118/35

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