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Add 9/60 and 8/21

9/60 + 8/21 is 223/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 21 is 420
  2. For the 1st fraction, since 60 × 7 = 420,
    9/60 = 9 × 7/60 × 7 = 63/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    8/21 = 8 × 20/21 × 20 = 160/420
  4. Add the two fractions:
    63/420 + 160/420 = 63 + 160/420 = 223/420

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