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Add 21/3 and 81/40

1st number: 7 0/3, 2nd number: 2 1/40

21/3 + 81/40 is 361/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 3 × 40 = 120,
    21/3 = 21 × 40/3 × 40 = 840/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    81/40 = 81 × 3/40 × 3 = 243/120
  4. Add the two like fractions:
    840/120 + 243/120 = 840 + 243/120 = 1083/120
  5. 1083/120 simplified gives 361/40
  6. So, 21/3 + 81/40 = 361/40
    In mixed form: 91/40

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