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Add 18/90 and 3/42

18/90 + 3/42 is 19/70.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    18/90 = 18 × 7/90 × 7 = 126/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    3/42 = 3 × 15/42 × 15 = 45/630
  4. Add the two like fractions:
    126/630 + 45/630 = 126 + 45/630 = 171/630
  5. 171/630 simplified gives 19/70
  6. So, 18/90 + 3/42 = 19/70

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