Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/80 from 28/63

28/63 - 21/80 is 131/720.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 80 is 5040
  2. For the 1st fraction, since 63 × 80 = 5040,
    28/63 = 28 × 80/63 × 80 = 2240/5040
  3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
    21/80 = 21 × 63/80 × 63 = 1323/5040
  4. Subtract the two fractions:
    2240/5040 - 1323/5040 = 2240 - 1323/5040 = 917/5040
  5. After reducing the fraction, the answer is 131/720

MathStep (Works offline)

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

Related:

© everydaycalculation.com