Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 45/18 from 20/25

1st number: 20/25, 2nd number: 2 9/18

20/25 - 45/18 is -17/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 18 is 450
  2. For the 1st fraction, since 25 × 18 = 450,
    20/25 = 20 × 18/25 × 18 = 360/450
  3. Likewise, for the 2nd fraction, since 18 × 25 = 450,
    45/18 = 45 × 25/18 × 25 = 1125/450
  4. Subtract the two fractions:
    360/450 - 1125/450 = 360 - 1125/450 = -765/450
  5. After reducing the fraction, the answer is -17/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com