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Add 20/21 and 5/18

20/21 + 5/18 is 155/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 21 × 6 = 126,
    20/21 = 20 × 6/21 × 6 = 120/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    5/18 = 5 × 7/18 × 7 = 35/126
  4. Add the two like fractions:
    120/126 + 35/126 = 120 + 35/126 = 155/126
  5. So, 20/21 + 5/18 = 155/126
    In mixed form: 129/126

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