Compare 12/5 and 75/21
1st number: 2 2/5, 2nd number: 3 12/21
12/5 is smaller than 75/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
12/5 = 12 × 21/5 × 21 = 252/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
75/21 = 75 × 5/21 × 5 = 375/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 252/105 < 375/105 or 12/5 < 75/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5 and 75/21 12/10 and 75/21 12/5 and 75/42 36/5 and 75/21 12/15 and 75/21 12/5 and 75/63 60/5 and 75/21 12/25 and 75/21 84/5 and 75/21 12/35 and 75/21