Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 70/84 from 20/75

20/75 - 70/84 is -17/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 84 is 2100
  2. For the 1st fraction, since 75 × 28 = 2100,
    20/75 = 20 × 28/75 × 28 = 560/2100
  3. Likewise, for the 2nd fraction, since 84 × 25 = 2100,
    70/84 = 70 × 25/84 × 25 = 1750/2100
  4. Subtract the two fractions:
    560/2100 - 1750/2100 = 560 - 1750/2100 = -1190/2100
  5. After reducing the fraction, the answer is -17/30

MathStep (Works offline)

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

Related:

© everydaycalculation.com