Compare 48/90 and 15/21
48/90 is smaller than 15/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
48/90 = 48 × 7/90 × 7 = 336/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
15/21 = 15 × 30/21 × 30 = 450/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 336/630 < 450/630 or 48/90 < 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/90 and 15/21 48/90 and 30/21 48/90 and 15/42 48/90 and 45/21 48/90 and 15/63 48/90 and 75/21