Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 4/21 from 1/45

1/45 - 4/21 is -53/315.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    1/45 = 1 × 7/45 × 7 = 7/315
  3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
    4/21 = 4 × 15/21 × 15 = 60/315
  4. Subtract the two like fractions:
    7/315 - 60/315 = 7 - 60/315 = -53/315

MathStep (Works offline)

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

Related:

© everydaycalculation.com