Compare 10/20 and 21/6, Which fraction is greater?

Compare 10/20 and 21/6

1^st number: 10/20, 2^nd number: 3 3/6

10/20 is smaller than 21/6

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 6 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60
Likewise, for the 2nd fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
30/60 < 210/60 or 10/20 < 21/6

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