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Add 21/7 and 1/20

1st number: 3 0/7, 2nd number: 1/20

21/7 + 1/20 is 61/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    21/7 = 21 × 20/7 × 20 = 420/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    1/20 = 1 × 7/20 × 7 = 7/140
  4. Add the two like fractions:
    420/140 + 7/140 = 420 + 7/140 = 427/140
  5. 427/140 simplified gives 61/20
  6. So, 21/7 + 1/20 = 61/20
    In mixed form: 31/20

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