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Add 20/21 and 80/18

1st number: 20/21, 2nd number: 4 8/18

20/21 + 80/18 is 340/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126
  2. For the 1st fraction, since 21 × 6 = 126,
    20/21 = 20 × 6/21 × 6 = 120/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    80/18 = 80 × 7/18 × 7 = 560/126
  4. Add the two fractions:
    120/126 + 560/126 = 120 + 560/126 = 680/126
  5. 680/126 simplified gives 340/63
  6. So, 20/21 + 80/18 = 340/63
    In mixed form: 525/63

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