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Add 15/60 and 72/90

15/60 + 72/90 is 21/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 90 is 180
  2. For the 1st fraction, since 60 × 3 = 180,
    15/60 = 15 × 3/60 × 3 = 45/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    72/90 = 72 × 2/90 × 2 = 144/180
  4. Add the two fractions:
    45/180 + 144/180 = 45 + 144/180 = 189/180
  5. After reducing the fraction, the answer is 21/20
  6. In mixed form: 11/20

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