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Add 15/90 and 42/72

15/90 + 42/72 is 3/4.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    15/90 = 15 × 4/90 × 4 = 60/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    42/72 = 42 × 5/72 × 5 = 210/360
  4. Add the two like fractions:
    60/360 + 210/360 = 60 + 210/360 = 270/360
  5. 270/360 simplified gives 3/4
  6. So, 15/90 + 42/72 = 3/4

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