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Add 18/45 and 5/21

18/45 + 5/21 is 67/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 21 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    18/45 = 18 × 7/45 × 7 = 126/315
  3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
    5/21 = 5 × 15/21 × 15 = 75/315
  4. Add the two like fractions:
    126/315 + 75/315 = 126 + 75/315 = 201/315
  5. 201/315 simplified gives 67/105
  6. So, 18/45 + 5/21 = 67/105

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