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Subtract 30/72 from 1/45

1/45 - 30/72 is -71/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 45 × 8 = 360,
    1/45 = 1 × 8/45 × 8 = 8/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    30/72 = 30 × 5/72 × 5 = 150/360
  4. Subtract the two like fractions:
    8/360 - 150/360 = 8 - 150/360 = -142/360
  5. After reducing the fraction, the answer is -71/180

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