Compare 84/18 and 3/21
1st number: 4 12/18, 2nd number: 3/21
84/18 is greater than 3/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
3/21 = 3 × 6/21 × 6 = 18/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 588/126 > 18/126 or 84/18 > 3/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18 and 6/21 84/36 and 3/21 84/18 and 3/42 84/18 and 9/21 84/54 and 3/21 84/18 and 3/63 84/18 and 15/21 84/90 and 3/21