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Add 21/35 and 40/60

21/35 + 40/60 is 19/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 60 is 420
  2. For the 1st fraction, since 35 × 12 = 420,
    21/35 = 21 × 12/35 × 12 = 252/420
  3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
    40/60 = 40 × 7/60 × 7 = 280/420
  4. Add the two fractions:
    252/420 + 280/420 = 252 + 280/420 = 532/420
  5. 532/420 simplified gives 19/15
  6. So, 21/35 + 40/60 = 19/15
    In mixed form: 14/15

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