Compare 42/30 and 21/15
1st number: 1 12/30, 2nd number: 1 6/15
42/30 is equivalent to 21/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/30 = 42/30 or 42/30 = 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30 and 21/15 42/30 and 42/15 42/60 and 21/15 42/30 and 21/30 42/30 and 63/15 42/90 and 21/15 42/30 and 21/45 42/30 and 21/75