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Add 8/15 and 21/90

8/15 + 21/90 is 23/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    8/15 = 8 × 6/15 × 6 = 48/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    21/90 = 21 × 1/90 × 1 = 21/90
  4. Add the two like fractions:
    48/90 + 21/90 = 48 + 21/90 = 69/90
  5. 69/90 simplified gives 23/30
  6. So, 8/15 + 21/90 = 23/30

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