Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 18/54 from 24/21

1st number: 1 3/21, 2nd number: 18/54

24/21 - 18/54 is 17/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 54 is 378
  2. For the 1st fraction, since 21 × 18 = 378,
    24/21 = 24 × 18/21 × 18 = 432/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    18/54 = 18 × 7/54 × 7 = 126/378
  4. Subtract the two fractions:
    432/378 - 126/378 = 432 - 126/378 = 306/378
  5. After reducing the fraction, the answer is 17/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com