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Add 20/21 and 35/70

20/21 + 35/70 is 61/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 70 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 70 × 3 = 210,
    35/70 = 35 × 3/70 × 3 = 105/210
  4. Add the two like fractions:
    200/210 + 105/210 = 200 + 105/210 = 305/210
  5. 305/210 simplified gives 61/42
  6. So, 20/21 + 35/70 = 61/42
    In mixed form: 119/42

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