Compare 81/20 and 6/90
1st number: 4 1/20, 2nd number: 6/90
81/20 is greater than 6/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
6/90 = 6 × 2/90 × 2 = 12/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 729/180 > 12/180 or 81/20 > 6/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20 and 12/90 81/40 and 6/90 81/20 and 18/90 81/60 and 6/90 81/20 and 30/90 81/20 and 42/90