Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 10/3 from 21/30

1st number: 21/30, 2nd number: 3 1/3

21/30 - 10/3 is -79/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 3 is 30

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 30 × 1 = 30,
    21/30 = 21 × 1/30 × 1 = 21/30
  3. Likewise, for the 2nd fraction, since 3 × 10 = 30,
    10/3 = 10 × 10/3 × 10 = 100/30
  4. Subtract the two like fractions:
    21/30 - 100/30 = 21 - 100/30 = -79/30

MathStep (Works offline)

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

Related:

© everydaycalculation.com