Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 63/12 from 15/21

1st number: 15/21, 2nd number: 5 3/12

15/21 - 63/12 is -127/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    15/21 = 15 × 4/21 × 4 = 60/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    63/12 = 63 × 7/12 × 7 = 441/84
  4. Subtract the two fractions:
    60/84 - 441/84 = 60 - 441/84 = -381/84
  5. After reducing the fraction, the answer is -127/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com