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Add 42/15 and 75/21

1st number: 2 12/15, 2nd number: 3 12/21

42/15 + 75/21 is 223/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    42/15 = 42 × 7/15 × 7 = 294/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    75/21 = 75 × 5/21 × 5 = 375/105
  4. Add the two like fractions:
    294/105 + 375/105 = 294 + 375/105 = 669/105
  5. 669/105 simplified gives 223/35
  6. So, 42/15 + 75/21 = 223/35
    In mixed form: 613/35

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