Compare 4/80 and 3/90
4/80 is greater than 3/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
3/90 = 3 × 8/90 × 8 = 24/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 36/720 > 24/720 or 4/80 > 3/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80 and 3/90 4/80 and 6/90 12/80 and 3/90 4/80 and 9/90 20/80 and 3/90 4/80 and 15/90 28/80 and 3/90 4/80 and 21/90