Compare 21/20 and 45/10
1st number: 1 1/20, 2nd number: 4 5/10
21/20 is smaller than 45/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 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 10 × 2 = 20,
45/10 = 45 × 2/10 × 2 = 90/20 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/20 < 90/20 or 21/20 < 45/10
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 45/10 21/20 and 90/10 21/40 and 45/10 21/20 and 45/20 63/20 and 45/10 21/60 and 45/10 21/20 and 45/30 21/20 and 45/50 21/20 and 45/70