Compare 20/63 and 15/45
20/63 is smaller than 15/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
20/63 = 20 × 5/63 × 5 = 100/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 100/315 < 105/315 or 20/63 < 15/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63 and 15/45 20/63 and 30/45 20/63 and 15/90 60/63 and 15/45 20/63 and 75/45