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Add 21/4 and 28/40

1st number: 5 1/4, 2nd number: 28/40

21/4 + 28/40 is 119/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 40 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 4 × 10 = 40,
    21/4 = 21 × 10/4 × 10 = 210/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    28/40 = 28 × 1/40 × 1 = 28/40
  4. Add the two like fractions:
    210/40 + 28/40 = 210 + 28/40 = 238/40
  5. 238/40 simplified gives 119/20
  6. So, 21/4 + 28/40 = 119/20
    In mixed form: 519/20

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