Compare 8/90 and 21/12
1st number: 8/90, 2nd number: 1 9/12
8/90 is smaller than 21/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
8/90 = 8 × 2/90 × 2 = 16/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 16/180 < 315/180 or 8/90 < 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90 and 21/12 8/90 and 42/12 8/90 and 21/24 24/90 and 21/12 8/90 and 63/12 8/90 and 21/36 40/90 and 21/12 8/90 and 21/60 56/90 and 21/12 8/90 and 21/84