Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 84/9 from 8/21

1st number: 8/21, 2nd number: 9 3/9

8/21 - 84/9 is -188/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    8/21 = 8 × 3/21 × 3 = 24/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    84/9 = 84 × 7/9 × 7 = 588/63
  4. Subtract the two fractions:
    24/63 - 588/63 = 24 - 588/63 = -564/63
  5. After reducing the fraction, the answer is -188/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com