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Add 20/21 and 48/70

20/21 + 48/70 is 172/105.

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,
    48/70 = 48 × 3/70 × 3 = 144/210
  4. Add the two like fractions:
    200/210 + 144/210 = 200 + 144/210 = 344/210
  5. 344/210 simplified gives 172/105
  6. So, 20/21 + 48/70 = 172/105
    In mixed form: 167/105

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