Compare 42/90 and 25/81
42/90 is greater than 25/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
42/90 = 42 × 9/90 × 9 = 378/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
25/81 = 25 × 10/81 × 10 = 250/810 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 378/810 > 250/810 or 42/90 > 25/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90 and 25/81 42/90 and 50/81 42/90 and 75/81