Compare 21/90 and 24/12, Which fraction is greater?

Compare 21/90 and 24/12

1^st number: 21/90, 2^nd number: 2 0/12

21/90 is smaller than 24/12

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180
Likewise, for the 2nd fraction, since 12 × 15 = 180,
24/12 = 24 × 15/12 × 15 = 360/180
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
42/180 < 360/180 or 21/90 < 24/12

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