Compare 21/20 and 30/4
1st number: 1 1/20, 2nd number: 7 2/4
21/20 is smaller than 30/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
30/4 = 30 × 5/4 × 5 = 150/20 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/20 < 150/20 or 21/20 < 30/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20 and 30/4 21/20 and 60/4 21/40 and 30/4 21/20 and 30/8 63/20 and 30/4 21/20 and 90/4 21/60 and 30/4 21/20 and 30/12 21/20 and 30/20 21/20 and 30/28