Compare 21/30 and 27/36
21/30 is smaller than 27/36
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
21/30 = 21 × 6/30 × 6 = 126/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
27/36 = 27 × 5/36 × 5 = 135/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 126/180 < 135/180 or 21/30 < 27/36
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 27/36 21/30 and 54/36 21/60 and 27/36 21/30 and 27/72 63/30 and 27/36 21/30 and 81/36 21/90 and 27/36