Compare 42/84 and 6/40, Which fraction is greater?

Compare 42/84 and 6/40

42/84 is greater than 6/40

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 84 × 10 = 840,
42/84 = 42 × 10/84 × 10 = 420/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
6/40 = 6 × 21/40 × 21 = 126/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
420/840 > 126/840 or 42/84 > 6/40

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