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Add 15/7 and 90/9

1st number: 2 1/7, 2nd number: 10 0/9

15/7 + 90/9 is 85/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 9 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 7 × 9 = 63,
    15/7 = 15 × 9/7 × 9 = 135/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    90/9 = 90 × 7/9 × 7 = 630/63
  4. Add the two like fractions:
    135/63 + 630/63 = 135 + 630/63 = 765/63
  5. 765/63 simplified gives 85/7
  6. So, 15/7 + 90/9 = 85/7
    In mixed form: 121/7

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