Compare 42/15 and 90/81
1st number: 2 12/15, 2nd number: 1 9/81
42/15 is greater than 90/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
42/15 = 42 × 27/15 × 27 = 1134/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
90/81 = 90 × 5/81 × 5 = 450/405 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1134/405 > 450/405 or 42/15 > 90/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15 and 90/81 42/30 and 90/81 42/45 and 90/81 42/75 and 90/81