Compare 20/81 and 90/50
1st number: 20/81, 2nd number: 1 40/50
20/81 is smaller than 90/50
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 50 is 4050
Next, find the equivalent fraction of both fractional numbers with denominator 4050 - For the 1st fraction, since 81 × 50 = 4050,
20/81 = 20 × 50/81 × 50 = 1000/4050 - Likewise, for the 2nd fraction, since 50 × 81 = 4050,
90/50 = 90 × 81/50 × 81 = 7290/4050 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1000/4050 < 7290/4050 or 20/81 < 90/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/81 and 90/50 60/81 and 90/50