Compare 15/42 and 64/90
15/42 is smaller than 64/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
64/90 = 64 × 7/90 × 7 = 448/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 225/630 < 448/630 or 15/42 < 64/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42 and 64/90 15/84 and 64/90 45/42 and 64/90 75/42 and 64/90