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Add 9/42 and 45/20

1st number: 9/42, 2nd number: 2 5/20

9/42 + 45/20 is 69/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420
  2. For the 1st fraction, since 42 × 10 = 420,
    9/42 = 9 × 10/42 × 10 = 90/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    45/20 = 45 × 21/20 × 21 = 945/420
  4. Add the two fractions:
    90/420 + 945/420 = 90 + 945/420 = 1035/420
  5. After reducing the fraction, the answer is 69/28
  6. In mixed form: 213/28

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