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Add 42/49 and 30/90

42/49 + 30/90 is 25/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 90 is 4410
  2. For the 1st fraction, since 49 × 90 = 4410,
    42/49 = 42 × 90/49 × 90 = 3780/4410
  3. Likewise, for the 2nd fraction, since 90 × 49 = 4410,
    30/90 = 30 × 49/90 × 49 = 1470/4410
  4. Add the two fractions:
    3780/4410 + 1470/4410 = 3780 + 1470/4410 = 5250/4410
  5. 5250/4410 simplified gives 25/21
  6. So, 42/49 + 30/90 = 25/21
    In mixed form: 14/21

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