Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 40/35 from 30/42

1st number: 30/42, 2nd number: 1 5/35

30/42 - 40/35 is -3/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 35 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    30/42 = 30 × 5/42 × 5 = 150/210
  3. Likewise, for the 2nd fraction, since 35 × 6 = 210,
    40/35 = 40 × 6/35 × 6 = 240/210
  4. Subtract the two fractions:
    150/210 - 240/210 = 150 - 240/210 = -90/210
  5. After reducing the fraction, the answer is -3/7

MathStep (Works offline)

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

Related:

© everydaycalculation.com