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Add 18/60 and 16/21

18/60 + 16/21 is 223/210.

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,
    16/21 = 16 × 20/21 × 20 = 320/420
  4. Add the two like fractions:
    126/420 + 320/420 = 126 + 320/420 = 446/420
  5. 446/420 simplified gives 223/210
  6. So, 18/60 + 16/21 = 223/210
    In mixed form: 113/210

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