Compare 10/40 and 21/9
1st number: 10/40, 2nd number: 2 3/9
10/40 is smaller than 21/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
21/9 = 21 × 40/9 × 40 = 840/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 90/360 < 840/360 or 10/40 < 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40 and 21/9 10/40 and 42/9 10/80 and 21/9 10/40 and 21/18 30/40 and 21/9 10/40 and 63/9 10/40 and 21/27 50/40 and 21/9 10/40 and 21/45 70/40 and 21/9 10/40 and 21/63