Compare 28/45 and 90/70
1st number: 28/45, 2nd number: 1 20/70
28/45 is smaller than 90/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 392/630 < 810/630 or 28/45 < 90/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45 and 90/70 28/90 and 90/70 84/45 and 90/70