Compare 21/30 and 40/10
1st number: 21/30, 2nd number: 4 0/10
21/30 is smaller than 40/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
40/10 = 40 × 3/10 × 3 = 120/30 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/30 < 120/30 or 21/30 < 40/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30 and 40/10 21/30 and 80/10 21/60 and 40/10 21/30 and 40/20 63/30 and 40/10 21/90 and 40/10 21/30 and 40/30 21/30 and 40/50 21/30 and 40/70