Answers

Compare 18/81 and 7/40

18/81 is greater than 7/40

Steps for comparing fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 40 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 81 × 40 = 3240,
   18/81 = 18 × 40/81 × 40 = 720/3240
3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
   7/40 = 7 × 81/40 × 81 = 567/3240
4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
5. 720/3240 > 567/3240 or 18/81 > 7/40

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