Compare 1/90 and 1/20
1/90 is smaller than 1/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
1/90 = 1 × 2/90 × 2 = 2/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
1/20 = 1 × 9/20 × 9 = 9/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 2/180 < 9/180 or 1/90 < 1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90 and 1/20 1/90 and 2/20 1/90 and 1/40 3/90 and 1/20 1/90 and 3/20 1/90 and 1/60 5/90 and 1/20 1/90 and 5/20 7/90 and 1/20 1/90 and 7/20