Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 40/7 from 20/18

1st number: 1 2/18, 2nd number: 5 5/7

20/18 - 40/7 is -290/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 7 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    20/18 = 20 × 7/18 × 7 = 140/126
  3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
    40/7 = 40 × 18/7 × 18 = 720/126
  4. Subtract the two fractions:
    140/126 - 720/126 = 140 - 720/126 = -580/126
  5. After reducing the fraction, the answer is -290/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com