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Add 1/90 and 1/42

1/90 + 1/42 is 11/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 42 is 630
  2. For the 1st fraction, since 90 × 7 = 630,
    1/90 = 1 × 7/90 × 7 = 7/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    1/42 = 1 × 15/42 × 15 = 15/630
  4. Add the two fractions:
    7/630 + 15/630 = 7 + 15/630 = 22/630
  5. After reducing the fraction, the answer is 11/315

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