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Add 15/20 and 1/42

15/20 + 1/42 is 65/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 42 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    15/20 = 15 × 21/20 × 21 = 315/420
  3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
    1/42 = 1 × 10/42 × 10 = 10/420
  4. Add the two like fractions:
    315/420 + 10/420 = 315 + 10/420 = 325/420
  5. 325/420 simplified gives 65/84
  6. So, 15/20 + 1/42 = 65/84

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