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Subtract 40/81 from 45/30

1st number: 1 15/30, 2nd number: 40/81

45/30 - 40/81 is 163/162.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 81 is 810
  2. For the 1st fraction, since 30 × 27 = 810,
    45/30 = 45 × 27/30 × 27 = 1215/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    40/81 = 40 × 10/81 × 10 = 400/810
  4. Subtract the two fractions:
    1215/810 - 400/810 = 1215 - 400/810 = 815/810
  5. After reducing the fraction, the answer is 163/162
  6. In mixed form: 11/162

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