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Add 28/20 and 21/45

1st number: 1 8/20, 2nd number: 21/45

28/20 + 21/45 is 28/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    28/20 = 28 × 9/20 × 9 = 252/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    21/45 = 21 × 4/45 × 4 = 84/180
  4. Add the two like fractions:
    252/180 + 84/180 = 252 + 84/180 = 336/180
  5. 336/180 simplified gives 28/15
  6. So, 28/20 + 21/45 = 28/15
    In mixed form: 113/15

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