Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 70/20 from 9/7

1st number: 1 2/7, 2nd number: 3 10/20

9/7 - 70/20 is -31/14.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    9/7 = 9 × 20/7 × 20 = 180/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    70/20 = 70 × 7/20 × 7 = 490/140
  4. Subtract the two like fractions:
    180/140 - 490/140 = 180 - 490/140 = -310/140
  5. After reducing the fraction, the answer is -31/14

MathStep (Works offline)

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

Related:

© everydaycalculation.com