Compare 18/63 and 81/21
1st number: 18/63, 2nd number: 3 18/21
18/63 is smaller than 81/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
18/63 = 18 × 1/63 × 1 = 18/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
81/21 = 81 × 3/21 × 3 = 243/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 18/63 < 243/63 or 18/63 < 81/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63 and 81/21 18/63 and 81/42 54/63 and 81/21 18/63 and 81/63 90/63 and 81/21