Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 18/72 from 42/10

1st number: 4 2/10, 2nd number: 18/72

42/10 - 18/72 is 79/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 10 × 36 = 360,
    42/10 = 42 × 36/10 × 36 = 1512/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    18/72 = 18 × 5/72 × 5 = 90/360
  4. Subtract the two like fractions:
    1512/360 - 90/360 = 1512 - 90/360 = 1422/360
  5. After reducing the fraction, the answer is 79/20
  6. In mixed form: 319/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com