Compare 12/20 and 21/25
12/20 is smaller than 21/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
12/20 = 12 × 5/20 × 5 = 60/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
21/25 = 21 × 4/25 × 4 = 84/100 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 60/100 < 84/100 or 12/20 < 21/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20 and 21/25 12/20 and 42/25 12/40 and 21/25 12/20 and 21/50 36/20 and 21/25 12/20 and 63/25 12/60 and 21/25 12/20 and 21/75 60/20 and 21/25 84/20 and 21/25