Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 28/80 from 28/90

28/90 - 28/80 is -7/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720
  2. For the 1st fraction, since 90 × 8 = 720,
    28/90 = 28 × 8/90 × 8 = 224/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    28/80 = 28 × 9/80 × 9 = 252/720
  4. Subtract the two fractions:
    224/720 - 252/720 = 224 - 252/720 = -28/720
  5. After reducing the fraction, the answer is -7/180

MathStep (Works offline)

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

Related:

© everydaycalculation.com