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Add 27/20 and 21/70

1st number: 1 7/20, 2nd number: 21/70

27/20 + 21/70 is 33/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 70 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    27/20 = 27 × 7/20 × 7 = 189/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    21/70 = 21 × 2/70 × 2 = 42/140
  4. Add the two like fractions:
    189/140 + 42/140 = 189 + 42/140 = 231/140
  5. 231/140 simplified gives 33/20
  6. So, 27/20 + 21/70 = 33/20
    In mixed form: 113/20

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