Compare 12/21 and 21/25
12/21 is smaller than 21/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
12/21 = 12 × 25/21 × 25 = 300/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
21/25 = 21 × 21/25 × 21 = 441/525 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 300/525 < 441/525 or 12/21 < 21/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21 and 21/25 12/21 and 42/25 12/42 and 21/25 12/21 and 21/50 36/21 and 21/25 12/21 and 63/25 12/63 and 21/25 12/21 and 21/75 60/21 and 21/25 84/21 and 21/25