Compare 21/45 and 3/10
21/45 is greater than 3/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
3/10 = 3 × 9/10 × 9 = 27/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/90 > 27/90 or 21/45 > 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45 and 3/10 21/45 and 6/10 21/90 and 3/10 21/45 and 3/20 63/45 and 3/10 21/45 and 9/10 21/45 and 3/30 21/45 and 15/10 21/45 and 3/50 21/45 and 21/10 21/45 and 3/70