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Add 21/28 and 25/30

21/28 + 25/30 is 19/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 30 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 28 × 15 = 420,
    21/28 = 21 × 15/28 × 15 = 315/420
  3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
    25/30 = 25 × 14/30 × 14 = 350/420
  4. Add the two like fractions:
    315/420 + 350/420 = 315 + 350/420 = 665/420
  5. 665/420 simplified gives 19/12
  6. So, 21/28 + 25/30 = 19/12
    In mixed form: 17/12

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