Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 28/18 from 45/80

1st number: 45/80, 2nd number: 1 10/18

45/80 - 28/18 is -143/144.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 18 is 720
  2. For the 1st fraction, since 80 × 9 = 720,
    45/80 = 45 × 9/80 × 9 = 405/720
  3. Likewise, for the 2nd fraction, since 18 × 40 = 720,
    28/18 = 28 × 40/18 × 40 = 1120/720
  4. Subtract the two fractions:
    405/720 - 1120/720 = 405 - 1120/720 = -715/720
  5. After reducing the fraction, the answer is -143/144

MathStep (Works offline)

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

Related:

© everydaycalculation.com