Compare 40/21 and 50/18, Which fraction is greater?

Compare 40/21 and 50/18

1^st number: 1 19/21, 2^nd number: 2 14/18

40/21 is smaller than 50/18

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
40/21 = 40 × 6/21 × 6 = 240/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
50/18 = 50 × 7/18 × 7 = 350/126
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
240/126 < 350/126 or 40/21 < 50/18

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