Compare 21/49 and 20/63
21/49 is greater than 20/63
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
21/49 = 21 × 9/49 × 9 = 189/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
20/63 = 20 × 7/63 × 7 = 140/441 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/441 > 140/441 or 21/49 > 20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49 and 20/63 21/49 and 40/63 21/98 and 20/63 63/49 and 20/63 21/49 and 60/63