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Add 4/10 and 1/21

4/10 + 1/21 is 47/105.

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,
    4/10 = 4 × 21/10 × 21 = 84/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    1/21 = 1 × 10/21 × 10 = 10/210
  4. Add the two fractions:
    84/210 + 10/210 = 84 + 10/210 = 94/210
  5. After reducing the fraction, the answer is 47/105

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