Compare 84/7 and 81/20
1st number: 12 0/7, 2nd number: 4 1/20
84/7 is greater than 81/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
84/7 = 84 × 20/7 × 20 = 1680/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1680/140 > 567/140 or 84/7 > 81/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/14 and 81/20 84/7 and 81/40 84/21 and 81/20 84/7 and 81/60 84/35 and 81/20 84/49 and 81/20