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Add 21/14 and 9/20

1st number: 1 7/14, 2nd number: 9/20

21/14 + 9/20 is 39/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 14 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 14 × 10 = 140,
    21/14 = 21 × 10/14 × 10 = 210/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    9/20 = 9 × 7/20 × 7 = 63/140
  4. Add the two like fractions:
    210/140 + 63/140 = 210 + 63/140 = 273/140
  5. 273/140 simplified gives 39/20
  6. So, 21/14 + 9/20 = 39/20
    In mixed form: 119/20

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