Compare 42/27 and 21/20
1st number: 1 15/27, 2nd number: 1 1/20
42/27 is greater than 21/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
42/27 = 42 × 20/27 × 20 = 840/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
21/20 = 21 × 27/20 × 27 = 567/540 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 840/540 > 567/540 or 42/27 > 21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27 and 21/20 42/27 and 42/20 42/54 and 21/20 42/27 and 21/40 42/27 and 63/20 42/81 and 21/20 42/27 and 21/60