Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Compare fractions

Compare 18/12 and 21/90

1st number: 1 6/12, 2nd number: 21/90

18/12 is greater than 21/90

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 12 × 15 = 180,
    18/12 = 18 × 15/12 × 15 = 270/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    21/90 = 21 × 2/90 × 2 = 42/180
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 270/180 > 42/180 or 18/12 > 21/90

MathStep (Works offline)

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

Related:

© everydaycalculation.com