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Add 21/70 and 42/8

1st number: 21/70, 2nd number: 5 2/8

21/70 + 42/8 is 111/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 8 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    21/70 = 21 × 4/70 × 4 = 84/280
  3. Likewise, for the 2nd fraction, since 8 × 35 = 280,
    42/8 = 42 × 35/8 × 35 = 1470/280
  4. Add the two like fractions:
    84/280 + 1470/280 = 84 + 1470/280 = 1554/280
  5. 1554/280 simplified gives 111/20
  6. So, 21/70 + 42/8 = 111/20
    In mixed form: 511/20

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