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Add 21/18 and 10/80

1st number: 1 3/18, 2nd number: 10/80

21/18 + 10/80 is 31/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 18 × 40 = 720,
    21/18 = 21 × 40/18 × 40 = 840/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    10/80 = 10 × 9/80 × 9 = 90/720
  4. Add the two like fractions:
    840/720 + 90/720 = 840 + 90/720 = 930/720
  5. 930/720 simplified gives 31/24
  6. So, 21/18 + 10/80 = 31/24
    In mixed form: 17/24

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