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Add 10/12 and 42/90

10/12 + 42/90 is 13/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 90 is 180
  2. For the 1st fraction, since 12 × 15 = 180,
    10/12 = 10 × 15/12 × 15 = 150/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    42/90 = 42 × 2/90 × 2 = 84/180
  4. Add the two fractions:
    150/180 + 84/180 = 150 + 84/180 = 234/180
  5. After reducing the fraction, the answer is 13/10
  6. In mixed form: 13/10

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