Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 1/18 from 42/40

1st number: 1 2/40, 2nd number: 1/18

42/40 - 1/18 is 179/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 18 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    42/40 = 42 × 9/40 × 9 = 378/360
  3. Likewise, for the 2nd fraction, since 18 × 20 = 360,
    1/18 = 1 × 20/18 × 20 = 20/360
  4. Subtract the two fractions:
    378/360 - 20/360 = 378 - 20/360 = 358/360
  5. After reducing the fraction, the answer is 179/180

MathStep (Works offline)

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

Related:

© everydaycalculation.com