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Add 21/40 and 18/3

1st number: 21/40, 2nd number: 6 0/3

21/40 + 18/3 is 261/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  3. Likewise, for the 2nd fraction, since 3 × 40 = 120,
    18/3 = 18 × 40/3 × 40 = 720/120
  4. Add the two like fractions:
    63/120 + 720/120 = 63 + 720/120 = 783/120
  5. 783/120 simplified gives 261/40
  6. So, 21/40 + 18/3 = 261/40
    In mixed form: 621/40

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