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Add 21/28 and 25/60

21/28 + 25/60 is 7/6.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 60 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 60 × 7 = 420,
    25/60 = 25 × 7/60 × 7 = 175/420
  4. Add the two like fractions:
    315/420 + 175/420 = 315 + 175/420 = 490/420
  5. 490/420 simplified gives 7/6
  6. So, 21/28 + 25/60 = 7/6
    In mixed form: 11/6

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