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Add 8/21 and 84/90

8/21 + 84/90 is 46/35.

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,
    8/21 = 8 × 30/21 × 30 = 240/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    84/90 = 84 × 7/90 × 7 = 588/630
  4. Add the two fractions:
    240/630 + 588/630 = 240 + 588/630 = 828/630
  5. After reducing the fraction, the answer is 46/35
  6. In mixed form: 111/35

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