Compare 21/30 and 25/27
21/30 is smaller than 25/27
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
21/30 = 21 × 9/30 × 9 = 189/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
25/27 = 25 × 10/27 × 10 = 250/270 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/270 < 250/270 or 21/30 < 25/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30 and 25/27 21/30 and 50/27 21/60 and 25/27 21/30 and 25/54 63/30 and 25/27 21/30 and 75/27 21/90 and 25/27 21/30 and 25/81