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Add 90/9 and 21/7

1st number: 10 0/9, 2nd number: 3 0/7

90/9 + 21/7 is 13/1.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 9 × 7 = 63,
    90/9 = 90 × 7/9 × 7 = 630/63
  3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
    21/7 = 21 × 9/7 × 9 = 189/63
  4. Add the two like fractions:
    630/63 + 189/63 = 630 + 189/63 = 819/63
  5. 819/63 simplified gives 13/1
  6. So, 90/9 + 21/7 = 13/1

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