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Add 21/25 and 20/30

21/25 + 20/30 is 113/75.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 30 is 150

    Next, find the equivalent fraction of both fractional numbers with denominator 150
  2. For the 1st fraction, since 25 × 6 = 150,
    21/25 = 21 × 6/25 × 6 = 126/150
  3. Likewise, for the 2nd fraction, since 30 × 5 = 150,
    20/30 = 20 × 5/30 × 5 = 100/150
  4. Add the two like fractions:
    126/150 + 100/150 = 126 + 100/150 = 226/150
  5. 226/150 simplified gives 113/75
  6. So, 21/25 + 20/30 = 113/75
    In mixed form: 138/75

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