Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 30/45 from 10/21

10/21 - 30/45 is -4/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    10/21 = 10 × 15/21 × 15 = 150/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    30/45 = 30 × 7/45 × 7 = 210/315
  4. Subtract the two like fractions:
    150/315 - 210/315 = 150 - 210/315 = -60/315
  5. After reducing the fraction, the answer is -4/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com