Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 70/18 from 45/80

1st number: 45/80, 2nd number: 3 16/18

45/80 - 70/18 is -479/144.

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,
    70/18 = 70 × 40/18 × 40 = 2800/720
  4. Subtract the two fractions:
    405/720 - 2800/720 = 405 - 2800/720 = -2395/720
  5. After reducing the fraction, the answer is -479/144

MathStep (Works offline)

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

Related:

© everydaycalculation.com