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Add 35/42 and 20/90

35/42 + 20/90 is 19/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    35/42 = 35 × 15/42 × 15 = 525/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    20/90 = 20 × 7/90 × 7 = 140/630
  4. Add the two fractions:
    525/630 + 140/630 = 525 + 140/630 = 665/630
  5. After reducing the fraction, the answer is 19/18
  6. In mixed form: 11/18

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