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Add 21/98 and 81/90

21/98 + 81/90 is 39/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 98 and 90 is 4410

    Next, find the equivalent fraction of both fractional numbers with denominator 4410
  2. For the 1st fraction, since 98 × 45 = 4410,
    21/98 = 21 × 45/98 × 45 = 945/4410
  3. Likewise, for the 2nd fraction, since 90 × 49 = 4410,
    81/90 = 81 × 49/90 × 49 = 3969/4410
  4. Add the two like fractions:
    945/4410 + 3969/4410 = 945 + 3969/4410 = 4914/4410
  5. 4914/4410 simplified gives 39/35
  6. So, 21/98 + 81/90 = 39/35
    In mixed form: 14/35

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