Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 84/45 from 1/21

1st number: 1/21, 2nd number: 1 39/45

1/21 - 84/45 is -191/105.

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,
    1/21 = 1 × 15/21 × 15 = 15/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    84/45 = 84 × 7/45 × 7 = 588/315
  4. Subtract the two like fractions:
    15/315 - 588/315 = 15 - 588/315 = -573/315
  5. After reducing the fraction, the answer is -191/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com