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Add 7/21 and 4/10

7/21 + 4/10 is 11/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 10 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    7/21 = 7 × 10/21 × 10 = 70/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    4/10 = 4 × 21/10 × 21 = 84/210
  4. Add the two fractions:
    70/210 + 84/210 = 70 + 84/210 = 154/210
  5. 154/210 simplified gives 11/15
  6. So, 7/21 + 4/10 = 11/15

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