Compare 9/90 and 81/70
1st number: 9/90, 2nd number: 1 11/70
9/90 is smaller than 81/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 63/630 < 729/630 or 9/90 < 81/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90 and 81/70 27/90 and 81/70 45/90 and 81/70 63/90 and 81/70