Compare 72/4 and 12/21
1st number: 18 0/4, 2nd number: 12/21
72/4 is greater than 12/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
72/4 = 72 × 21/4 × 21 = 1512/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
12/21 = 12 × 4/21 × 4 = 48/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1512/84 > 48/84 or 72/4 > 12/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4 and 24/21 72/8 and 12/21 72/4 and 12/42 72/4 and 36/21 72/12 and 12/21 72/4 and 12/63 72/4 and 60/21 72/20 and 12/21 72/4 and 84/21 72/28 and 12/21