Compare 40/12 and 21/10, Which fraction is greater?

Compare 40/12 and 21/10

1^st number: 3 4/12, 2^nd number: 2 1/10

40/12 is greater than 21/10

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 10 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 12 × 5 = 60,
40/12 = 40 × 5/12 × 5 = 200/60
Likewise, for the 2nd fraction, since 10 × 6 = 60,
21/10 = 21 × 6/10 × 6 = 126/60
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
200/60 > 126/60 or 40/12 > 21/10

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