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Subtract 4/80 from 28/90

28/90 - 4/80 is 47/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720
  2. For the 1st fraction, since 90 × 8 = 720,
    28/90 = 28 × 8/90 × 8 = 224/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    4/80 = 4 × 9/80 × 9 = 36/720
  4. Subtract the two fractions:
    224/720 - 36/720 = 224 - 36/720 = 188/720
  5. After reducing the fraction, the answer is 47/180

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