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Add 18/21 and 35/20

1st number: 18/21, 2nd number: 1 15/20

18/21 + 35/20 is 73/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    18/21 = 18 × 20/21 × 20 = 360/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    35/20 = 35 × 21/20 × 21 = 735/420
  4. Add the two like fractions:
    360/420 + 735/420 = 360 + 735/420 = 1095/420
  5. 1095/420 simplified gives 73/28
  6. So, 18/21 + 35/20 = 73/28
    In mixed form: 217/28

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