Compare 21/8 and 32/81
1st number: 2 5/8, 2nd number: 32/81
21/8 is greater than 32/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
21/8 = 21 × 81/8 × 81 = 1701/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
32/81 = 32 × 8/81 × 8 = 256/648 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1701/648 > 256/648 or 21/8 > 32/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8 and 32/81 21/8 and 64/81 21/16 and 32/81 63/8 and 32/81 21/8 and 96/81 21/24 and 32/81 21/40 and 32/81 21/56 and 32/81