Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 28/7 from 21/28

1st number: 21/28, 2nd number: 4 0/7

21/28 - 28/7 is -13/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 7 is 28

    Next, find the equivalent fraction of both fractional numbers with denominator 28
  2. For the 1st fraction, since 28 × 1 = 28,
    21/28 = 21 × 1/28 × 1 = 21/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    28/7 = 28 × 4/7 × 4 = 112/28
  4. Subtract the two like fractions:
    21/28 - 112/28 = 21 - 112/28 = -91/28
  5. After reducing the fraction, the answer is -13/4

MathStep (Works offline)

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

Related:

© everydaycalculation.com