Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 18/21 from 2/42

2/42 - 18/21 is -17/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 21 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 42 × 1 = 42,
    2/42 = 2 × 1/42 × 1 = 2/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    18/21 = 18 × 2/21 × 2 = 36/42
  4. Subtract the two like fractions:
    2/42 - 36/42 = 2 - 36/42 = -34/42
  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