Compare 10/72 and 42/80, Which fraction is greater?

Compare 10/72 and 42/80

10/72 is smaller than 42/80

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 72 × 10 = 720,
10/72 = 10 × 10/72 × 10 = 100/720
Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
100/720 < 378/720 or 10/72 < 42/80

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