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Add 4/21 and 35/90

4/21 + 35/90 is 73/126.

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,
    4/21 = 4 × 30/21 × 30 = 120/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    35/90 = 35 × 7/90 × 7 = 245/630
  4. Add the two fractions:
    120/630 + 245/630 = 120 + 245/630 = 365/630
  5. After reducing the fraction, the answer is 73/126

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