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Add 15/20 and 42/45

15/20 + 42/45 is 101/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    15/20 = 15 × 9/20 × 9 = 135/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    42/45 = 42 × 4/45 × 4 = 168/180
  4. Add the two fractions:
    135/180 + 168/180 = 135 + 168/180 = 303/180
  5. After reducing the fraction, the answer is 101/60
  6. In mixed form: 141/60

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