Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 20/42 from 15/4

1st number: 3 3/4, 2nd number: 20/42

15/4 - 20/42 is 275/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 42 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    15/4 = 15 × 21/4 × 21 = 315/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    20/42 = 20 × 2/42 × 2 = 40/84
  4. Subtract the two fractions:
    315/84 - 40/84 = 315 - 40/84 = 275/84
  5. In mixed form: 323/84

MathStep (Works offline)

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

Related:

© everydaycalculation.com