Compare 27/21 and 45/42
1st number: 1 6/21, 2nd number: 1 3/42
27/21 is greater than 45/42
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
27/21 = 27 × 2/21 × 2 = 54/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
45/42 = 45 × 1/42 × 1 = 45/42 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 54/42 > 45/42 or 27/21 > 45/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21 and 45/42 27/21 and 90/42 27/42 and 45/42 27/21 and 45/84 81/21 and 45/42 27/63 and 45/42