Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 35/20 from 30/21

1st number: 1 9/21, 2nd number: 1 15/20

30/21 - 35/20 is -9/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    30/21 = 30 × 20/21 × 20 = 600/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    35/20 = 35 × 21/20 × 21 = 735/420
  4. Subtract the two like fractions:
    600/420 - 735/420 = 600 - 735/420 = -135/420
  5. After reducing the fraction, the answer is -9/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com