Compare 9/80 and 21/30, Which fraction is greater?

Compare 9/80 and 21/30

9/80 is smaller than 21/30

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
9/80 = 9 × 3/80 × 3 = 27/240
Likewise, for the 2nd fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
27/240 < 168/240 or 9/80 < 21/30

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