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Add 20/90 and 7/72

20/90 + 7/72 is 23/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 72 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    20/90 = 20 × 4/90 × 4 = 80/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    7/72 = 7 × 5/72 × 5 = 35/360
  4. Add the two fractions:
    80/360 + 35/360 = 80 + 35/360 = 115/360
  5. 115/360 simplified gives 23/72
  6. So, 20/90 + 7/72 = 23/72

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