Compare 30/5 and 90/21
1st number: 6 0/5, 2nd number: 4 6/21
30/5 is greater than 90/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
30/5 = 30 × 21/5 × 21 = 630/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
90/21 = 90 × 5/21 × 5 = 450/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 630/105 > 450/105 or 30/5 > 90/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5 and 90/21 30/10 and 90/21 30/5 and 90/42 90/5 and 90/21 30/15 and 90/21 30/5 and 90/63 30/25 and 90/21 30/35 and 90/21