Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 84/18 from 4/21

1st number: 4/21, 2nd number: 4 12/18

4/21 - 84/18 is -94/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126
  2. For the 1st fraction, since 21 × 6 = 126,
    4/21 = 4 × 6/21 × 6 = 24/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    84/18 = 84 × 7/18 × 7 = 588/126
  4. Subtract the two fractions:
    24/126 - 588/126 = 24 - 588/126 = -564/126
  5. After reducing the fraction, the answer is -94/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com