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Add 21/36 and 6/20

21/36 + 6/20 is 53/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 20 is 180
  2. For the 1st fraction, since 36 × 5 = 180,
    21/36 = 21 × 5/36 × 5 = 105/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    6/20 = 6 × 9/20 × 9 = 54/180
  4. Add the two fractions:
    105/180 + 54/180 = 105 + 54/180 = 159/180
  5. 159/180 simplified gives 53/60
  6. So, 21/36 + 6/20 = 53/60

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