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Add 21/40 and 63/5

1st number: 21/40, 2nd number: 12 3/5

21/40 + 63/5 is 105/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 5 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 40 × 1 = 40,
    21/40 = 21 × 1/40 × 1 = 21/40
  3. Likewise, for the 2nd fraction, since 5 × 8 = 40,
    63/5 = 63 × 8/5 × 8 = 504/40
  4. Add the two like fractions:
    21/40 + 504/40 = 21 + 504/40 = 525/40
  5. 525/40 simplified gives 105/8
  6. So, 21/40 + 63/5 = 105/8
    In mixed form: 131/8

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