Compare 84/30 and 15/42, Which fraction is greater?

Compare 84/30 and 15/42

1^st number: 2 24/30, 2^nd number: 15/42

84/30 is greater than 15/42

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
84/30 = 84 × 7/30 × 7 = 588/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
588/210 > 75/210 or 84/30 > 15/42

MathStep (Works offline)

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