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Add 42/90 and 14/21

42/90 + 14/21 is 17/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 21 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    42/90 = 42 × 7/90 × 7 = 294/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    14/21 = 14 × 30/21 × 30 = 420/630
  4. Add the two like fractions:
    294/630 + 420/630 = 294 + 420/630 = 714/630
  5. 714/630 simplified gives 17/15
  6. So, 42/90 + 14/21 = 17/15
    In mixed form: 12/15

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