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Add 21/4 and 18/5

1st number: 5 1/4, 2nd number: 3 3/5

21/4 + 18/5 is 177/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    21/4 = 21 × 5/4 × 5 = 105/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    18/5 = 18 × 4/5 × 4 = 72/20
  4. Add the two like fractions:
    105/20 + 72/20 = 105 + 72/20 = 177/20
  5. So, 21/4 + 18/5 = 177/20
    In mixed form: 817/20

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