Compare 27/21 and 4/90
1st number: 1 6/21, 2nd number: 4/90
27/21 is greater than 4/90
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,
27/21 = 27 × 30/21 × 30 = 810/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 810/630 > 28/630 or 27/21 > 4/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21 and 4/90 27/21 and 8/90 27/42 and 4/90 81/21 and 4/90 27/21 and 12/90 27/63 and 4/90 27/21 and 20/90 27/21 and 28/90