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Add 20/42 and 75/90

20/42 + 75/90 is 55/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 42 × 15 = 630,
    20/42 = 20 × 15/42 × 15 = 300/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    75/90 = 75 × 7/90 × 7 = 525/630
  4. Add the two like fractions:
    300/630 + 525/630 = 300 + 525/630 = 825/630
  5. 825/630 simplified gives 55/42
  6. So, 20/42 + 75/90 = 55/42
    In mixed form: 113/42

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