Compare 25/72 and 15/21, Which fraction is greater?

Compare 25/72 and 15/21

25/72 is smaller than 15/21

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
25/72 = 25 × 7/72 × 7 = 175/504
Likewise, for the 2nd fraction, since 21 × 24 = 504,
15/21 = 15 × 24/21 × 24 = 360/504
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
175/504 < 360/504 or 25/72 < 15/21

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