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Add 10/30 and 8/21

10/30 + 8/21 is 5/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    10/30 = 10 × 7/30 × 7 = 70/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    8/21 = 8 × 10/21 × 10 = 80/210
  4. Add the two like fractions:
    70/210 + 80/210 = 70 + 80/210 = 150/210
  5. 150/210 simplified gives 5/7
  6. So, 10/30 + 8/21 = 5/7

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