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Add 20/21 and 6/30

20/21 + 6/30 is 121/105.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    20/21 = 20 × 10/21 × 10 = 200/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    6/30 = 6 × 7/30 × 7 = 42/210
  4. Add the two like fractions:
    200/210 + 42/210 = 200 + 42/210 = 242/210
  5. 242/210 simplified gives 121/105
  6. So, 20/21 + 6/30 = 121/105
    In mixed form: 116/105

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