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Add 4/90 and 12/20

4/90 + 12/20 is 29/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    4/90 = 4 × 2/90 × 2 = 8/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    12/20 = 12 × 9/20 × 9 = 108/180
  4. Add the two like fractions:
    8/180 + 108/180 = 8 + 108/180 = 116/180
  5. 116/180 simplified gives 29/45
  6. So, 4/90 + 12/20 = 29/45

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