Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 50/80 from 4/42

4/42 - 50/80 is -89/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    4/42 = 4 × 40/42 × 40 = 160/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    50/80 = 50 × 21/80 × 21 = 1050/1680
  4. Subtract the two fractions:
    160/1680 - 1050/1680 = 160 - 1050/1680 = -890/1680
  5. After reducing the fraction, the answer is -89/168

MathStep (Works offline)

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

Related:

© everydaycalculation.com