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Add 70/72 and 15/20

70/72 + 15/20 is 31/18.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    70/72 = 70 × 5/72 × 5 = 350/360
  3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
    15/20 = 15 × 18/20 × 18 = 270/360
  4. Add the two like fractions:
    350/360 + 270/360 = 350 + 270/360 = 620/360
  5. 620/360 simplified gives 31/18
  6. So, 70/72 + 15/20 = 31/18
    In mixed form: 113/18

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