Compare 21/30 and 40/16, Which fraction is greater?

Compare 21/30 and 40/16

1^st number: 21/30, 2^nd number: 2 8/16

21/30 is smaller than 40/16

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240
Likewise, for the 2nd fraction, since 16 × 15 = 240,
40/16 = 40 × 15/16 × 15 = 600/240
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
168/240 < 600/240 or 21/30 < 40/16

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