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Add 42/60 and 15/84

42/60 + 15/84 is 123/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 60 × 7 = 420,
    42/60 = 42 × 7/60 × 7 = 294/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    15/84 = 15 × 5/84 × 5 = 75/420
  4. Add the two like fractions:
    294/420 + 75/420 = 294 + 75/420 = 369/420
  5. 369/420 simplified gives 123/140
  6. So, 42/60 + 15/84 = 123/140

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