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Add 21/15 and 3/8

1st number: 1 6/15, 2nd number: 3/8

21/15 + 3/8 is 71/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 8 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 15 × 8 = 120,
    21/15 = 21 × 8/15 × 8 = 168/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    3/8 = 3 × 15/8 × 15 = 45/120
  4. Add the two like fractions:
    168/120 + 45/120 = 168 + 45/120 = 213/120
  5. 213/120 simplified gives 71/40
  6. So, 21/15 + 3/8 = 71/40
    In mixed form: 131/40

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