Compare 20/81 and 12/70, Which fraction is greater?

Compare 20/81 and 12/70

20/81 is greater than 12/70

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670

Next, find the equivalent fraction of both fractional numbers with denominator 5670
For the 1st fraction, since 81 × 70 = 5670,
20/81 = 20 × 70/81 × 70 = 1400/5670
Likewise, for the 2nd fraction, since 70 × 81 = 5670,
12/70 = 12 × 81/70 × 81 = 972/5670
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
1400/5670 > 972/5670 or 20/81 > 12/70

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