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Add 42/49 and 21/70

42/49 + 21/70 is 81/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 70 is 490

    Next, find the equivalent fraction of both fractional numbers with denominator 490
  2. For the 1st fraction, since 49 × 10 = 490,
    42/49 = 42 × 10/49 × 10 = 420/490
  3. Likewise, for the 2nd fraction, since 70 × 7 = 490,
    21/70 = 21 × 7/70 × 7 = 147/490
  4. Add the two like fractions:
    420/490 + 147/490 = 420 + 147/490 = 567/490
  5. 567/490 simplified gives 81/70
  6. So, 42/49 + 21/70 = 81/70
    In mixed form: 111/70

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