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Add 56/15 and 21/40

1st number: 3 11/15, 2nd number: 21/40

56/15 + 21/40 is 511/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 40 is 120
  2. For the 1st fraction, since 15 × 8 = 120,
    56/15 = 56 × 8/15 × 8 = 448/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  4. Add the two fractions:
    448/120 + 63/120 = 448 + 63/120 = 511/120
  5. So, 56/15 + 21/40 = 511/120
    In mixed form: 431/120

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