Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 63/4 from 30/21

1st number: 1 9/21, 2nd number: 15 3/4

30/21 - 63/4 is -401/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 4 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    30/21 = 30 × 4/21 × 4 = 120/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    63/4 = 63 × 21/4 × 21 = 1323/84
  4. Subtract the two fractions:
    120/84 - 1323/84 = 120 - 1323/84 = -1203/84
  5. After reducing the fraction, the answer is -401/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com