Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 21/9 from 27/40

1st number: 27/40, 2nd number: 2 3/9

27/40 - 21/9 is -199/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 9 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    27/40 = 27 × 9/40 × 9 = 243/360
  3. Likewise, for the 2nd fraction, since 9 × 40 = 360,
    21/9 = 21 × 40/9 × 40 = 840/360
  4. Subtract the two fractions:
    243/360 - 840/360 = 243 - 840/360 = -597/360
  5. After reducing the fraction, the answer is -199/120

MathStep (Works offline)

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

Related:

© everydaycalculation.com