Compare 24/18 and 90/21
1st number: 1 6/18, 2nd number: 4 6/21
24/18 is smaller than 90/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
24/18 = 24 × 7/18 × 7 = 168/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
90/21 = 90 × 6/21 × 6 = 540/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 168/126 < 540/126 or 24/18 < 90/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/18 and 90/21 24/36 and 90/21 24/18 and 90/42 72/18 and 90/21 24/54 and 90/21 24/18 and 90/63 24/90 and 90/21