Compare 81/16 and 21/18
1st number: 5 1/16, 2nd number: 1 3/18
81/16 is greater than 21/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 18 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 16 × 9 = 144,
81/16 = 81 × 9/16 × 9 = 729/144 - Likewise, for the 2nd fraction, since 18 × 8 = 144,
21/18 = 21 × 8/18 × 8 = 168/144 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 729/144 > 168/144 or 81/16 > 21/18
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