Compare 20/5 and 21/45
1st number: 4 0/5, 2nd number: 21/45
20/5 is greater than 21/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
20/5 = 20 × 9/5 × 9 = 180/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/45 > 21/45 or 20/5 > 21/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5 and 21/45 20/5 and 42/45 20/10 and 21/45 20/5 and 21/90 60/5 and 21/45 20/5 and 63/45 20/15 and 21/45 20/25 and 21/45 20/35 and 21/45