Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 9/21 from 6/15

6/15 - 9/21 is -1/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105
  2. For the 1st fraction, since 15 × 7 = 105,
    6/15 = 6 × 7/15 × 7 = 42/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    9/21 = 9 × 5/21 × 5 = 45/105
  4. Subtract the two fractions:
    42/105 - 45/105 = 42 - 45/105 = -3/105
  5. After reducing the fraction, the answer is -1/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com