Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 45/42 from 20/15

1st number: 1 5/15, 2nd number: 1 3/42

20/15 - 45/42 is 11/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210
  2. For the 1st fraction, since 15 × 14 = 210,
    20/15 = 20 × 14/15 × 14 = 280/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    45/42 = 45 × 5/42 × 5 = 225/210
  4. Subtract the two fractions:
    280/210 - 225/210 = 280 - 225/210 = 55/210
  5. After reducing the fraction, the answer is 11/42

MathStep (Works offline)

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

Related:

© everydaycalculation.com