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Add 1/20 and 15/72

1/20 + 15/72 is 31/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 20 × 18 = 360,
    1/20 = 1 × 18/20 × 18 = 18/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    15/72 = 15 × 5/72 × 5 = 75/360
  4. Add the two like fractions:
    18/360 + 75/360 = 18 + 75/360 = 93/360
  5. 93/360 simplified gives 31/120
  6. So, 1/20 + 15/72 = 31/120

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