Compare 72/80 and 18/15, Which fraction is greater?

Compare 72/80 and 18/15

1^st number: 72/80, 2^nd number: 1 3/15

72/80 is smaller than 18/15

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 15 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
72/80 = 72 × 3/80 × 3 = 216/240
Likewise, for the 2nd fraction, since 15 × 16 = 240,
18/15 = 18 × 16/15 × 16 = 288/240
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
216/240 < 288/240 or 72/80 < 18/15

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad