Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 3/81 from 1/70

1/70 - 3/81 is -43/1890.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 81 is 5670
  2. For the 1st fraction, since 70 × 81 = 5670,
    1/70 = 1 × 81/70 × 81 = 81/5670
  3. Likewise, for the 2nd fraction, since 81 × 70 = 5670,
    3/81 = 3 × 70/81 × 70 = 210/5670
  4. Subtract the two fractions:
    81/5670 - 210/5670 = 81 - 210/5670 = -129/5670
  5. After reducing the fraction, the answer is -43/1890

MathStep (Works offline)

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

Related:

© everydaycalculation.com