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Add 10/42 and 10/15

10/42 + 10/15 is 19/21.

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,
    10/42 = 10 × 5/42 × 5 = 50/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    10/15 = 10 × 14/15 × 14 = 140/210
  4. Add the two fractions:
    50/210 + 140/210 = 50 + 140/210 = 190/210
  5. After reducing the fraction, the answer is 19/21

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