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Add 10/21 and 16/90

10/21 + 16/90 is 206/315.

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,
    10/21 = 10 × 30/21 × 30 = 300/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    16/90 = 16 × 7/90 × 7 = 112/630
  4. Add the two fractions:
    300/630 + 112/630 = 300 + 112/630 = 412/630
  5. After reducing the fraction, the answer is 206/315

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