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Add 21/8 and 42/5

1st number: 2 5/8, 2nd number: 8 2/5

21/8 + 42/5 is 441/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 5 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 8 × 5 = 40,
    21/8 = 21 × 5/8 × 5 = 105/40
  3. Likewise, for the 2nd fraction, since 5 × 8 = 40,
    42/5 = 42 × 8/5 × 8 = 336/40
  4. Add the two like fractions:
    105/40 + 336/40 = 105 + 336/40 = 441/40
  5. So, 21/8 + 42/5 = 441/40
    In mixed form: 111/40

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