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Add 12/42 and 5/90

12/42 + 5/90 is 43/126.

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,
    12/42 = 12 × 15/42 × 15 = 180/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    5/90 = 5 × 7/90 × 7 = 35/630
  4. Add the two fractions:
    180/630 + 35/630 = 180 + 35/630 = 215/630
  5. 215/630 simplified gives 43/126
  6. So, 12/42 + 5/90 = 43/126

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