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Add 21/56 and 20/36

21/56 + 20/36 is 67/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 36 is 504
  2. For the 1st fraction, since 56 × 9 = 504,
    21/56 = 21 × 9/56 × 9 = 189/504
  3. Likewise, for the 2nd fraction, since 36 × 14 = 504,
    20/36 = 20 × 14/36 × 14 = 280/504
  4. Add the two fractions:
    189/504 + 280/504 = 189 + 280/504 = 469/504
  5. After reducing the fraction, the answer is 67/72

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