Compare 63/80 and 90/72
1st number: 63/80, 2nd number: 1 18/72
63/80 is smaller than 90/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
63/80 = 63 × 9/80 × 9 = 567/720 - Likewise, for the 2nd fraction, since 72 × 10 = 720,
90/72 = 90 × 10/72 × 10 = 900/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/720 < 900/720 or 63/80 < 90/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: