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Add 18/30 and 20/72

18/30 + 20/72 is 79/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 30 × 12 = 360,
    18/30 = 18 × 12/30 × 12 = 216/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    20/72 = 20 × 5/72 × 5 = 100/360
  4. Add the two like fractions:
    216/360 + 100/360 = 216 + 100/360 = 316/360
  5. 316/360 simplified gives 79/90
  6. So, 18/30 + 20/72 = 79/90

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