Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 5/7 from 21/20

1st number: 1 1/20, 2nd number: 5/7

21/20 - 5/7 is 47/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 7 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    21/20 = 21 × 7/20 × 7 = 147/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    5/7 = 5 × 20/7 × 20 = 100/140
  4. Subtract the two like fractions:
    147/140 - 100/140 = 147 - 100/140 = 47/140

MathStep (Works offline)

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

Related:

© everydaycalculation.com