Compare 21/10 and 30/80, Which fraction is greater?

Compare 21/10 and 30/80

1^st number: 2 1/10, 2^nd number: 30/80

21/10 is greater than 30/80

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 10 × 8 = 80,
21/10 = 21 × 8/10 × 8 = 168/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
168/80 > 30/80 or 21/10 > 30/80

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