Compare 15/45 and 7/20
15/45 is smaller than 7/20
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,
15/45 = 15 × 4/45 × 4 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 60/180 < 63/180 or 15/45 < 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45 and 7/20 15/45 and 14/20 15/90 and 7/20 15/45 and 7/40 15/45 and 21/20 15/45 and 7/60 75/45 and 7/20 15/45 and 35/20 15/45 and 49/20