Compare 40/80 and 5/90
40/80 is greater than 5/90
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,
40/80 = 40 × 9/80 × 9 = 360/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
5/90 = 5 × 8/90 × 8 = 40/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 360/720 > 40/720 or 40/80 > 5/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80 and 10/90 40/80 and 15/90 40/80 and 25/90 40/80 and 35/90