Compare 15/21 and 30/50
15/21 is greater than 30/50
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
15/21 = 15 × 50/21 × 50 = 750/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
30/50 = 30 × 21/50 × 21 = 630/1050 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 750/1050 > 630/1050 or 15/21 > 30/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21 and 30/50 15/21 and 60/50 15/42 and 30/50 45/21 and 30/50 15/21 and 90/50 15/63 and 30/50 75/21 and 30/50