Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/7 from 1/40

1st number: 1/40, 2nd number: 3 0/7

1/40 - 21/7 is -119/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 7 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    1/40 = 1 × 7/40 × 7 = 7/280
  3. Likewise, for the 2nd fraction, since 7 × 40 = 280,
    21/7 = 21 × 40/7 × 40 = 840/280
  4. Subtract the two like fractions:
    7/280 - 840/280 = 7 - 840/280 = -833/280
  5. After reducing the fraction, the answer is -119/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com