Compare 21/50 and 7/20
21/50 is greater than 7/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 50 × 2 = 100,
21/50 = 21 × 2/50 × 2 = 42/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
7/20 = 7 × 5/20 × 5 = 35/100 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/100 > 35/100 or 21/50 > 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50 and 7/20 21/50 and 14/20 21/50 and 7/40 63/50 and 7/20 21/50 and 21/20 21/50 and 7/60 21/50 and 35/20 21/50 and 49/20