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Add 3/10 and 4/21

3/10 + 4/21 is 103/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 21 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 21 × 10 = 210,
    4/21 = 4 × 10/21 × 10 = 40/210
  4. Add the two fractions:
    63/210 + 40/210 = 63 + 40/210 = 103/210

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