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Add 7/21 and 10/18

7/21 + 10/18 is 8/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 21 × 6 = 126,
    7/21 = 7 × 6/21 × 6 = 42/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    10/18 = 10 × 7/18 × 7 = 70/126
  4. Add the two like fractions:
    42/126 + 70/126 = 42 + 70/126 = 112/126
  5. 112/126 simplified gives 8/9
  6. So, 7/21 + 10/18 = 8/9

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