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Add 72/90 and 9/36

72/90 + 9/36 is 21/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 36 is 180
  2. For the 1st fraction, since 90 × 2 = 180,
    72/90 = 72 × 2/90 × 2 = 144/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    9/36 = 9 × 5/36 × 5 = 45/180
  4. Add the two fractions:
    144/180 + 45/180 = 144 + 45/180 = 189/180
  5. After reducing the fraction, the answer is 21/20
  6. In mixed form: 11/20

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