Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 15/81 from 1/7

1/7 - 15/81 is -8/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 81 is 567

    Next, find the equivalent fraction of both fractional numbers with denominator 567
  2. For the 1st fraction, since 7 × 81 = 567,
    1/7 = 1 × 81/7 × 81 = 81/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    15/81 = 15 × 7/81 × 7 = 105/567
  4. Subtract the two like fractions:
    81/567 - 105/567 = 81 - 105/567 = -24/567
  5. After reducing the fraction, the answer is -8/189

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com