Compare 6/42 and 21/15
1st number: 6/42, 2nd number: 1 6/15
6/42 is smaller than 21/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
6/42 = 6 × 5/42 × 5 = 30/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 30/210 < 294/210 or 6/42 < 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42 and 21/15 6/42 and 42/15 6/84 and 21/15 6/42 and 21/30 18/42 and 21/15 6/42 and 63/15 6/42 and 21/45 30/42 and 21/15 6/42 and 21/75