Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 42/21 from 10/42

1st number: 10/42, 2nd number: 2 0/21

10/42 - 42/21 is -37/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 21 is 42
  2. For the 1st fraction, since 42 × 1 = 42,
    10/42 = 10 × 1/42 × 1 = 10/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    42/21 = 42 × 2/21 × 2 = 84/42
  4. Subtract the two fractions:
    10/42 - 84/42 = 10 - 84/42 = -74/42
  5. After reducing the fraction, the answer is -37/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com