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Add 21/20 and 10/80

1st number: 1 1/20, 2nd number: 10/80

21/20 + 10/80 is 47/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 20 × 4 = 80,
    21/20 = 21 × 4/20 × 4 = 84/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    10/80 = 10 × 1/80 × 1 = 10/80
  4. Add the two like fractions:
    84/80 + 10/80 = 84 + 10/80 = 94/80
  5. 94/80 simplified gives 47/40
  6. So, 21/20 + 10/80 = 47/40
    In mixed form: 17/40

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