Compare 30/80 and 70/40
1st number: 30/80, 2nd number: 1 30/40
30/80 is smaller than 70/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
70/40 = 70 × 2/40 × 2 = 140/80 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 30/80 < 140/80 or 30/80 < 70/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80 and 70/40 30/80 and 70/80 90/80 and 70/40