Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/20 from 6/8

1st number: 6/8, 2nd number: 1 1/20

6/8 - 21/20 is -3/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 20 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 8 × 5 = 40,
    6/8 = 6 × 5/8 × 5 = 30/40
  3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
    21/20 = 21 × 2/20 × 2 = 42/40
  4. Subtract the two like fractions:
    30/40 - 42/40 = 30 - 42/40 = -12/40
  5. After reducing the fraction, the answer is -3/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com