Compare 81/4 and 30/7
1st number: 20 1/4, 2nd number: 4 2/7
81/4 is greater than 30/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
81/4 = 81 × 7/4 × 7 = 567/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
30/7 = 30 × 4/7 × 4 = 120/28 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/28 > 120/28 or 81/4 > 30/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4 and 60/7 81/8 and 30/7 81/4 and 30/14 81/4 and 90/7 81/12 and 30/7 81/4 and 30/21 81/20 and 30/7 81/4 and 30/35 81/28 and 30/7 81/4 and 30/49