Compare 4/81 and 2/20
4/81 is smaller than 2/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
4/81 = 4 × 20/81 × 20 = 80/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
2/20 = 2 × 81/20 × 81 = 162/1620 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 80/1620 < 162/1620 or 4/81 < 2/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/81 and 2/20 4/81 and 4/20 4/81 and 2/40 12/81 and 2/20 4/81 and 6/20 4/81 and 2/60 20/81 and 2/20 4/81 and 10/20 28/81 and 2/20 4/81 and 14/20