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Add 18/60 and 8/21

18/60 + 8/21 is 143/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 60 × 7 = 420,
    18/60 = 18 × 7/60 × 7 = 126/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    8/21 = 8 × 20/21 × 20 = 160/420
  4. Add the two like fractions:
    126/420 + 160/420 = 126 + 160/420 = 286/420
  5. 286/420 simplified gives 143/210
  6. So, 18/60 + 8/21 = 143/210

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