Compare 36/21 and 45/20
1st number: 1 15/21, 2nd number: 2 5/20
36/21 is smaller than 45/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
36/21 = 36 × 20/21 × 20 = 720/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
45/20 = 45 × 21/20 × 21 = 945/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 720/420 < 945/420 or 36/21 < 45/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21 and 45/20 36/21 and 90/20 36/42 and 45/20 36/21 and 45/40 36/63 and 45/20 36/21 and 45/60