Compare 56/21 and 90/20
1st number: 2 14/21, 2nd number: 4 10/20
56/21 is smaller than 90/20
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,
56/21 = 56 × 20/21 × 20 = 1120/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
90/20 = 90 × 21/20 × 21 = 1890/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1120/420 < 1890/420 or 56/21 < 90/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42 and 90/20 56/21 and 90/40 56/63 and 90/20 56/21 and 90/60