Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 80/7 from 90/9

1st number: 10 0/9, 2nd number: 11 3/7

90/9 - 80/7 is -10/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 7 is 63
  2. For the 1st fraction, since 9 × 7 = 63,
    90/9 = 90 × 7/9 × 7 = 630/63
  3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
    80/7 = 80 × 9/7 × 9 = 720/63
  4. Subtract the two fractions:
    630/63 - 720/63 = 630 - 720/63 = -90/63
  5. After reducing the fraction, the answer is -10/7

MathStep (Works offline)

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

Related:

© everydaycalculation.com