Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 40/81 from 9/30

9/30 - 40/81 is -157/810.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 81 is 810

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 30 × 27 = 810,
    9/30 = 9 × 27/30 × 27 = 243/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    40/81 = 40 × 10/81 × 10 = 400/810
  4. Subtract the two like fractions:
    243/810 - 400/810 = 243 - 400/810 = -157/810

MathStep (Works offline)

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

Related:

© everydaycalculation.com