Compare 21/90 and 21/60
21/90 is smaller than 21/60
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/180 < 63/180 or 21/90 < 21/60
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 21/60 21/90 and 42/60 63/90 and 21/60 21/90 and 63/60