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Subtract 36/72 from 1/90

1/90 - 36/72 is -22/45.

Steps for subtracting 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,
    1/90 = 1 × 4/90 × 4 = 4/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    36/72 = 36 × 5/72 × 5 = 180/360
  4. Subtract the two fractions:
    4/360 - 180/360 = 4 - 180/360 = -176/360
  5. After reducing the fraction, the answer is -22/45

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