Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 9/7 from 4/21

1st number: 4/21, 2nd number: 1 2/7

4/21 - 9/7 is -23/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21
  2. For the 1st fraction, since 21 × 1 = 21,
    4/21 = 4 × 1/21 × 1 = 4/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    9/7 = 9 × 3/7 × 3 = 27/21
  4. Subtract the two fractions:
    4/21 - 27/21 = 4 - 27/21 = -23/21

Related:

Use fraction calculator with our all-in-one calculator app: Download for Android, Download for iOS

© everydaycalculation.com