Compare 6/21 and 90/70, Which fraction is greater?

Compare 6/21 and 90/70

1^st number: 6/21, 2^nd number: 1 20/70

6/21 is smaller than 90/70

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
60/210 < 270/210 or 6/21 < 90/70

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