Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/4 from 90/2

1st number: 45 0/2, 2nd number: 5 1/4

90/2 - 21/4 is 159/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 4 is 4

    Next, find the equivalent fraction of both fractional numbers with denominator 4
  2. For the 1st fraction, since 2 × 2 = 4,
    90/2 = 90 × 2/2 × 2 = 180/4
  3. Likewise, for the 2nd fraction, since 4 × 1 = 4,
    21/4 = 21 × 1/4 × 1 = 21/4
  4. Subtract the two like fractions:
    180/4 - 21/4 = 180 - 21/4 = 159/4
  5. In mixed form: 393/4

MathStep (Works offline)

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

Related:

© everydaycalculation.com