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Add 8/70 and 84/90

8/70 + 84/90 is 22/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    8/70 = 8 × 9/70 × 9 = 72/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    84/90 = 84 × 7/90 × 7 = 588/630
  4. Add the two fractions:
    72/630 + 588/630 = 72 + 588/630 = 660/630
  5. After reducing the fraction, the answer is 22/21
  6. In mixed form: 11/21

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