Compare 15/42 and 70/40, Which fraction is greater?

Compare 15/42 and 70/40

1^st number: 15/42, 2^nd number: 1 30/40

15/42 is smaller than 70/40

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
15/42 = 15 × 20/42 × 20 = 300/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
300/840 < 1470/840 or 15/42 < 70/40

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