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Add 45/42 and 72/15

1st number: 1 3/42, 2nd number: 4 12/15

45/42 + 72/15 is 411/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 15 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    45/42 = 45 × 5/42 × 5 = 225/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    72/15 = 72 × 14/15 × 14 = 1008/210
  4. Add the two like fractions:
    225/210 + 1008/210 = 225 + 1008/210 = 1233/210
  5. 1233/210 simplified gives 411/70
  6. So, 45/42 + 72/15 = 411/70
    In mixed form: 561/70

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