Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 40/21 from 20/9

1st number: 2 2/9, 2nd number: 1 19/21

20/9 - 40/21 is 20/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 21 is 63
  2. For the 1st fraction, since 9 × 7 = 63,
    20/9 = 20 × 7/9 × 7 = 140/63
  3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
    40/21 = 40 × 3/21 × 3 = 120/63
  4. Subtract the two fractions:
    140/63 - 120/63 = 140 - 120/63 = 20/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com