Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 4/15 from 2/21

2/21 - 4/15 is -6/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    2/21 = 2 × 5/21 × 5 = 10/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    4/15 = 4 × 7/15 × 7 = 28/105
  4. Subtract the two like fractions:
    10/105 - 28/105 = 10 - 28/105 = -18/105
  5. After reducing the fraction, the answer is -6/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com