Compare 21/15 and 10/40
1st number: 1 6/15, 2nd number: 10/40
21/15 is greater than 10/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
21/15 = 21 × 8/15 × 8 = 168/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 168/120 > 30/120 or 21/15 > 10/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15 and 10/40 21/15 and 20/40 21/30 and 10/40 21/15 and 10/80 63/15 and 10/40 21/15 and 30/40 21/45 and 10/40 21/15 and 50/40 21/75 and 10/40 21/15 and 70/40