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Add 4/72 and 12/90

4/72 + 12/90 is 17/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    4/72 = 4 × 5/72 × 5 = 20/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    12/90 = 12 × 4/90 × 4 = 48/360
  4. Add the two like fractions:
    20/360 + 48/360 = 20 + 48/360 = 68/360
  5. 68/360 simplified gives 17/90
  6. So, 4/72 + 12/90 = 17/90

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