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Add 3/10 and 18/42

3/10 + 18/42 is 51/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 42 is 210
  2. For the 1st fraction, since 10 × 21 = 210,
    3/10 = 3 × 21/10 × 21 = 63/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    18/42 = 18 × 5/42 × 5 = 90/210
  4. Add the two fractions:
    63/210 + 90/210 = 63 + 90/210 = 153/210
  5. After reducing the fraction, the answer is 51/70

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