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Add 20/45 and 49/72

20/45 + 49/72 is 9/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 45 × 8 = 360,
    20/45 = 20 × 8/45 × 8 = 160/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    49/72 = 49 × 5/72 × 5 = 245/360
  4. Add the two like fractions:
    160/360 + 245/360 = 160 + 245/360 = 405/360
  5. 405/360 simplified gives 9/8
  6. So, 20/45 + 49/72 = 9/8
    In mixed form: 11/8

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