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Add 18/80 and 63/4

1st number: 18/80, 2nd number: 15 3/4

18/80 + 63/4 is 639/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 4 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    18/80 = 18 × 1/80 × 1 = 18/80
  3. Likewise, for the 2nd fraction, since 4 × 20 = 80,
    63/4 = 63 × 20/4 × 20 = 1260/80
  4. Add the two like fractions:
    18/80 + 1260/80 = 18 + 1260/80 = 1278/80
  5. 1278/80 simplified gives 639/40
  6. So, 18/80 + 63/4 = 639/40
    In mixed form: 1539/40

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