Compare 49/21 and 42/90
1st number: 2 7/21, 2nd number: 42/90
49/21 is greater than 42/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
49/21 = 49 × 30/21 × 30 = 1470/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1470/630 > 294/630 or 49/21 > 42/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21 and 42/90 49/21 and 84/90 49/42 and 42/90 49/63 and 42/90