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Add 21/8 and 45/9

1st number: 2 5/8, 2nd number: 5 0/9

21/8 + 45/9 is 61/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 9 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 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,
    45/9 = 45 × 8/9 × 8 = 360/72
  4. Add the two like fractions:
    189/72 + 360/72 = 189 + 360/72 = 549/72
  5. 549/72 simplified gives 61/8
  6. So, 21/8 + 45/9 = 61/8
    In mixed form: 75/8

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