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Add 21/8 and 10/9

1st number: 2 5/8, 2nd number: 1 1/9

21/8 + 10/9 is 269/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 9 is 72
  2. For the 1st fraction, since 8 × 9 = 72,
    21/8 = 21 × 9/8 × 9 = 189/72
  3. Likewise, for the 2nd fraction, since 9 × 8 = 72,
    10/9 = 10 × 8/9 × 8 = 80/72
  4. Add the two fractions:
    189/72 + 80/72 = 189 + 80/72 = 269/72
  5. In mixed form: 353/72

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