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Add 3/21 and 1/90

3/21 + 1/90 is 97/630.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630
  2. For the 1st fraction, since 21 × 30 = 630,
    3/21 = 3 × 30/21 × 30 = 90/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    1/90 = 1 × 7/90 × 7 = 7/630
  4. Add the two fractions:
    90/630 + 7/630 = 90 + 7/630 = 97/630
  5. So, 3/21 + 1/90 = 97/630

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