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Add 21/42 and 45/15

1st number: 21/42, 2nd number: 3 0/15

21/42 + 45/15 is 7/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 15 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    21/42 = 21 × 5/42 × 5 = 105/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    45/15 = 45 × 14/15 × 14 = 630/210
  4. Add the two fractions:
    105/210 + 630/210 = 105 + 630/210 = 735/210
  5. After reducing the fraction, the answer is 7/2
  6. In mixed form: 31/2

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