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Add 21/3 and 63/40

1st number: 7 0/3, 2nd number: 1 23/40

21/3 + 63/40 is 343/40.

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,
    63/40 = 63 × 3/40 × 3 = 189/120
  4. Add the two like fractions:
    840/120 + 189/120 = 840 + 189/120 = 1029/120
  5. 1029/120 simplified gives 343/40
  6. So, 21/3 + 63/40 = 343/40
    In mixed form: 823/40

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