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Add 21/60 and 7/21

21/60 + 7/21 is 41/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 60 × 7 = 420,
    21/60 = 21 × 7/60 × 7 = 147/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    7/21 = 7 × 20/21 × 20 = 140/420
  4. Add the two like fractions:
    147/420 + 140/420 = 147 + 140/420 = 287/420
  5. 287/420 simplified gives 41/60
  6. So, 21/60 + 7/21 = 41/60

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