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Add 28/42 and 42/90

28/42 + 42/90 is 17/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 42 × 15 = 630,
    28/42 = 28 × 15/42 × 15 = 420/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    42/90 = 42 × 7/90 × 7 = 294/630
  4. Add the two like fractions:
    420/630 + 294/630 = 420 + 294/630 = 714/630
  5. 714/630 simplified gives 17/15
  6. So, 28/42 + 42/90 = 17/15
    In mixed form: 12/15

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