Compare 12/15 and 90/72
1st number: 12/15, 2nd number: 1 18/72
12/15 is smaller than 90/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
12/15 = 12 × 24/15 × 24 = 288/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 288/360 < 450/360 or 12/15 < 90/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15 and 90/72 12/30 and 90/72 36/15 and 90/72 12/45 and 90/72 60/15 and 90/72 12/75 and 90/72 84/15 and 90/72