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Add 28/90 and 20/72

28/90 + 20/72 is 53/90.

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,
    28/90 = 28 × 4/90 × 4 = 112/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    20/72 = 20 × 5/72 × 5 = 100/360
  4. Add the two fractions:
    112/360 + 100/360 = 112 + 100/360 = 212/360
  5. 212/360 simplified gives 53/90
  6. So, 28/90 + 20/72 = 53/90

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