Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 2/30 from 15/21

15/21 - 2/30 is 68/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    15/21 = 15 × 10/21 × 10 = 150/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    2/30 = 2 × 7/30 × 7 = 14/210
  4. Subtract the two like fractions:
    150/210 - 14/210 = 150 - 14/210 = 136/210
  5. After reducing the fraction, the answer is 68/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com