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Add 21/90 and 21/8

1st number: 21/90, 2nd number: 2 5/8

21/90 + 21/8 is 343/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 8 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    21/90 = 21 × 4/90 × 4 = 84/360
  3. Likewise, for the 2nd fraction, since 8 × 45 = 360,
    21/8 = 21 × 45/8 × 45 = 945/360
  4. Add the two like fractions:
    84/360 + 945/360 = 84 + 945/360 = 1029/360
  5. 1029/360 simplified gives 343/120
  6. So, 21/90 + 21/8 = 343/120
    In mixed form: 2103/120

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