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Add 18/90 and 70/72

18/90 + 70/72 is 211/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    18/90 = 18 × 4/90 × 4 = 72/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    70/72 = 70 × 5/72 × 5 = 350/360
  4. Add the two like fractions:
    72/360 + 350/360 = 72 + 350/360 = 422/360
  5. 422/360 simplified gives 211/180
  6. So, 18/90 + 70/72 = 211/180
    In mixed form: 131/180

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