Compare 10/45 and 5/20
10/45 is smaller than 5/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
10/45 = 10 × 4/45 × 4 = 40/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 40/180 < 45/180 or 10/45 < 5/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45 and 5/20 10/45 and 10/20 10/90 and 5/20 10/45 and 5/40 30/45 and 5/20 10/45 and 15/20 10/45 and 5/60 50/45 and 5/20 10/45 and 25/20 70/45 and 5/20 10/45 and 35/20