Compare 18/8 and 21/40
1st number: 2 2/8, 2nd number: 21/40
18/8 is greater than 21/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 90/40 > 21/40 or 18/8 > 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8 and 21/40 18/8 and 42/40 18/16 and 21/40 18/8 and 21/80 54/8 and 21/40 18/8 and 63/40 18/24 and 21/40 90/8 and 21/40 18/40 and 21/40 18/56 and 21/40