Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 15/20 from 20/70

20/70 - 15/20 is -13/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 20 is 140
  2. For the 1st fraction, since 70 × 2 = 140,
    20/70 = 20 × 2/70 × 2 = 40/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    15/20 = 15 × 7/20 × 7 = 105/140
  4. Subtract the two fractions:
    40/140 - 105/140 = 40 - 105/140 = -65/140
  5. After reducing the fraction, the answer is -13/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com