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Add 21/30 and 18/25

21/30 + 18/25 is 71/50.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 150
  2. For the 1st fraction, since 30 × 5 = 150,
    21/30 = 21 × 5/30 × 5 = 105/150
  3. Likewise, for the 2nd fraction, since 25 × 6 = 150,
    18/25 = 18 × 6/25 × 6 = 108/150
  4. Add the two like fractions:
    105/150 + 108/150 = 105 + 108/150 = 213/150
  5. 213/150 simplified gives 71/50
  6. So, 21/30 + 18/25 = 71/50
    In mixed form: 121/50

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