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Add 8/42 and 3/90

8/42 + 3/90 is 47/210.

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,
    8/42 = 8 × 15/42 × 15 = 120/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    3/90 = 3 × 7/90 × 7 = 21/630
  4. Add the two fractions:
    120/630 + 21/630 = 120 + 21/630 = 141/630
  5. 141/630 simplified gives 47/210
  6. So, 8/42 + 3/90 = 47/210

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