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Add 4/21 and 3/72

4/21 + 3/72 is 13/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 72 is 504
  2. For the 1st fraction, since 21 × 24 = 504,
    4/21 = 4 × 24/21 × 24 = 96/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    3/72 = 3 × 7/72 × 7 = 21/504
  4. Add the two fractions:
    96/504 + 21/504 = 96 + 21/504 = 117/504
  5. After reducing the fraction, the answer is 13/56

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