Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 7/45 from 81/80

1st number: 1 1/80, 2nd number: 7/45

81/80 - 7/45 is 617/720.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 45 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    81/80 = 81 × 9/80 × 9 = 729/720
  3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
    7/45 = 7 × 16/45 × 16 = 112/720
  4. Subtract the two like fractions:
    729/720 - 112/720 = 729 - 112/720 = 617/720

MathStep (Works offline)

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

Related:

© everydaycalculation.com