Compare 42/84 and 6/90, Which fraction is greater?

Compare 42/84 and 6/90

42/84 is greater than 6/90

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 84 × 15 = 1260,
42/84 = 42 × 15/84 × 15 = 630/1260
Likewise, for the 2nd fraction, since 90 × 14 = 1260,
6/90 = 6 × 14/90 × 14 = 84/1260
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
630/1260 > 84/1260 or 42/84 > 6/90

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