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Add 42/72 and 16/90

42/72 + 16/90 is 137/180.

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,
    42/72 = 42 × 5/72 × 5 = 210/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    16/90 = 16 × 4/90 × 4 = 64/360
  4. Add the two like fractions:
    210/360 + 64/360 = 210 + 64/360 = 274/360
  5. 274/360 simplified gives 137/180
  6. So, 42/72 + 16/90 = 137/180

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