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Add 12/20 and 90/72

1st number: 12/20, 2nd number: 1 18/72

12/20 + 90/72 is 37/20.

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,
    12/20 = 12 × 18/20 × 18 = 216/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    90/72 = 90 × 5/72 × 5 = 450/360
  4. Add the two like fractions:
    216/360 + 450/360 = 216 + 450/360 = 666/360
  5. 666/360 simplified gives 37/20
  6. So, 12/20 + 90/72 = 37/20
    In mixed form: 117/20

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