Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 90/49 from 81/80

1st number: 1 1/80, 2nd number: 1 41/49

81/80 - 90/49 is -3231/3920.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 49 is 3920
  2. For the 1st fraction, since 80 × 49 = 3920,
    81/80 = 81 × 49/80 × 49 = 3969/3920
  3. Likewise, for the 2nd fraction, since 49 × 80 = 3920,
    90/49 = 90 × 80/49 × 80 = 7200/3920
  4. Subtract the two fractions:
    3969/3920 - 7200/3920 = 3969 - 7200/3920 = -3231/3920

MathStep (Works offline)

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

Related:

© everydaycalculation.com