Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 21/7 from 5/4

1st number: 1 1/4, 2nd number: 3 0/7

5/4 - 21/7 is -7/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    5/4 = 5 × 7/4 × 7 = 35/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    21/7 = 21 × 4/7 × 4 = 84/28
  4. Subtract the two fractions:
    35/28 - 84/28 = 35 - 84/28 = -49/28
  5. After reducing the fraction, the answer is -7/4

Related:

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

© everydaycalculation.com