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Add 21/20 and 45/25

1st number: 1 1/20, 2nd number: 1 20/25

21/20 + 45/25 is 57/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 25 is 100

    Next, find the equivalent fraction of both fractional numbers with denominator 100
  2. For the 1st fraction, since 20 × 5 = 100,
    21/20 = 21 × 5/20 × 5 = 105/100
  3. Likewise, for the 2nd fraction, since 25 × 4 = 100,
    45/25 = 45 × 4/25 × 4 = 180/100
  4. Add the two like fractions:
    105/100 + 180/100 = 105 + 180/100 = 285/100
  5. 285/100 simplified gives 57/20
  6. So, 21/20 + 45/25 = 57/20
    In mixed form: 217/20

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