Compare 63/42 and 40/30
1st number: 1 21/42, 2nd number: 1 10/30
63/42 is greater than 40/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
40/30 = 40 × 7/30 × 7 = 280/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 315/210 > 280/210 or 63/42 > 40/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42 and 80/30 63/84 and 40/30 63/42 and 40/60 63/42 and 40/90