Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 30/12 from 4/21

1st number: 4/21, 2nd number: 2 6/12

4/21 - 30/12 is -97/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    4/21 = 4 × 4/21 × 4 = 16/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    30/12 = 30 × 7/12 × 7 = 210/84
  4. Subtract the two like fractions:
    16/84 - 210/84 = 16 - 210/84 = -194/84
  5. After reducing the fraction, the answer is -97/42

MathStep (Works offline)

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

Related:

© everydaycalculation.com