Compare 21/48 and 9/90
21/48 is greater than 9/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
21/48 = 21 × 15/48 × 15 = 315/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
9/90 = 9 × 8/90 × 8 = 72/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 315/720 > 72/720 or 21/48 > 9/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48 and 9/90 21/48 and 18/90 21/96 and 9/90 63/48 and 9/90 21/48 and 27/90 21/48 and 45/90 21/48 and 63/90