Compare 21/25 and 28/30
21/25 is smaller than 28/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 25 × 6 = 150,
21/25 = 21 × 6/25 × 6 = 126/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
28/30 = 28 × 5/30 × 5 = 140/150 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 126/150 < 140/150 or 21/25 < 28/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25 and 28/30 21/25 and 56/30 21/50 and 28/30 21/25 and 28/60 63/25 and 28/30 21/25 and 84/30 21/75 and 28/30 21/25 and 28/90