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Add 42/84 and 3/90

42/84 + 3/90 is 8/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 90 is 1260
  2. For the 1st fraction, since 84 × 15 = 1260,
    42/84 = 42 × 15/84 × 15 = 630/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    3/90 = 3 × 14/90 × 14 = 42/1260
  4. Add the two fractions:
    630/1260 + 42/1260 = 630 + 42/1260 = 672/1260
  5. After reducing the fraction, the answer is 8/15

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