Compare 21/90 and 6/15
21/90 is smaller than 6/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
6/15 = 6 × 6/15 × 6 = 36/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/90 < 36/90 or 21/90 < 6/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90 and 6/15 21/90 and 12/15 21/90 and 6/30 63/90 and 6/15 21/90 and 18/15 21/90 and 6/45 21/90 and 30/15 21/90 and 6/75 21/90 and 42/15